What is the 2017 VW Tiguan Gas Mileage and How to Improve It?

The 2017 Vw Tiguan Gas Mileage averages around 23.48 MPG combined, according to driver-submitted data; however, this figure can fluctuate based on driving habits, maintenance, and environmental conditions. At CAR-TOOL.EDU.VN, we aim to provide you with a comprehensive understanding of fuel efficiency and ways to optimize your vehicle’s performance, providing valuable insights to help you enhance your Tiguan’s MPG and save money on fuel costs, as well as access to a wide array of auto repair tools. Discover ways to maximize your fuel economy, explore advanced diagnostic tools, and maintain your vehicle effectively with our resources.

1. Understanding the 2017 VW Tiguan Gas Mileage

What is the typical gas mileage for the 2017 VW Tiguan? The 2017 VW Tiguan typically achieves an average combined gas mileage of around 23.48 MPG, based on a substantial dataset from 126 vehicles, encompassing 6,489 fuel-ups and over 2 million miles of driving. This figure serves as a reliable benchmark for owners and prospective buyers alike, giving a clear indication of what to expect under normal driving conditions.

Diving deeper, the 23.48 MPG average is derived from real-world data, offering a more accurate representation than manufacturer estimates, which are often conducted under ideal conditions. Fuelly, a platform where drivers log their fuel-ups, provides this data, showcasing a distribution of fuel efficiency among various 2017 Tiguan models. It’s important to note that this average comes with a margin of error of approximately 0.14 MPG, accounting for variations in driving styles and vehicle conditions. According to the EPA, the 2017 VW Tiguan has an estimated fuel economy of 20 MPG in the city and 24 MPG on the highway, with a combined MPG of 22. These numbers can vary based on driving conditions and vehicle maintenance.

1.1 Factors Influencing Fuel Efficiency

What factors significantly affect the fuel efficiency of the 2017 VW Tiguan? Several factors can significantly influence the fuel efficiency of your 2017 VW Tiguan. These range from driving habits to vehicle maintenance and even environmental conditions. Understanding these elements can help you optimize your MPG and save on fuel costs.

• Driving Habits: Aggressive driving, characterized by rapid acceleration, hard braking, and high speeds, is one of the primary culprits behind poor fuel economy. According to a study by the U.S. Department of Energy, aggressive driving can lower your gas mileage by as much as 33% at highway speeds and 5% around town. Consistent and smooth driving, on the other hand, helps maintain optimal fuel consumption.
• Vehicle Maintenance: Regular maintenance is crucial for ensuring your Tiguan runs efficiently. Underinflated tires increase rolling resistance, forcing the engine to work harder. A study by the National Highway Traffic Safety Administration (NHTSA) found that properly inflated tires can improve gas mileage by up to 3%. Similarly, dirty air filters restrict airflow to the engine, reducing its efficiency. Replacing these filters regularly ensures the engine breathes easily and burns fuel more efficiently.
• Environmental Conditions: Weather and road conditions also play a significant role. Cold weather can reduce fuel economy because engines take longer to warm up and fluids become thicker, increasing friction. The EPA estimates that in city driving, a conventional gasoline car’s gas mileage is roughly 12% lower at 20°F than it would be at 77°F. Additionally, driving on hilly or mountainous terrain requires more engine power, which in turn increases fuel consumption.
• Vehicle Load: The weight your Tiguan carries affects its MPG. Extra weight increases the amount of energy needed to accelerate and maintain speed. Removing unnecessary items from your vehicle can make a noticeable difference over time.
• Fuel Quality: Using the recommended grade of gasoline is essential. The 2017 VW Tiguan is designed to run on regular unleaded gasoline with an octane rating of 87. Using premium fuel when it’s not required won’t improve performance and is simply a waste of money.
• Idling: Excessive idling consumes fuel without covering any distance. It’s more fuel-efficient to turn off the engine if you anticipate being stationary for more than a minute.
• Use of Air Conditioning: The air conditioning system puts an extra load on the engine, which can decrease fuel economy by as much as 20%, especially in city driving. Using the AC sparingly or opting for the ventilation system when possible can help save fuel.
• Aerodynamics: External accessories like roof racks and cargo carriers increase aerodynamic drag, reducing fuel efficiency. Removing these items when they are not in use can improve your MPG. A study by the Society of Automotive Engineers (SAE) found that aerodynamic drag can significantly impact fuel economy at highway speeds.

By being mindful of these factors and adopting efficient driving habits, you can significantly improve the fuel efficiency of your 2017 VW Tiguan. Regular maintenance, smooth driving, and reducing unnecessary weight are all effective strategies for maximizing your MPG and minimizing fuel costs.

1.2 Real-World MPG vs. EPA Estimates

How does the real-world MPG of the 2017 VW Tiguan compare to EPA estimates? The real-world MPG of the 2017 VW Tiguan often varies from the EPA estimates, and understanding these differences is crucial for setting realistic expectations. While the EPA provides standardized testing to estimate fuel economy, real-world conditions introduce numerous variables that can affect MPG.

EPA estimates for the 2017 VW Tiguan are around 20 MPG in the city and 24 MPG on the highway, with a combined MPG of 22. These figures are obtained under controlled conditions, which aim to simulate typical driving scenarios. However, these tests cannot account for the wide range of factors that drivers encounter daily.

Real-world data, such as that collected by Fuelly, offers insights into what actual drivers are experiencing. According to Fuelly’s data from 126 vehicles, 6,489 fuel-ups, and over 2 million miles of driving, the average combined MPG for the 2017 VW Tiguan is approximately 23.48. This is slightly higher than the EPA’s combined estimate, which might surprise some owners.

• Variations in Driving Conditions: The EPA’s tests are conducted in a lab, eliminating variables like traffic, weather, and terrain. In contrast, real-world driving includes stop-and-go traffic, inclement weather, and varied road conditions, all of which impact fuel economy.
• Driving Habits: The EPA’s tests use a standardized driving cycle, whereas individual driving habits can significantly sway fuel efficiency. Aggressive acceleration, frequent braking, and high speeds reduce MPG, while smooth, consistent driving improves it.
• Vehicle Maintenance: Properly maintained vehicles tend to achieve better fuel economy. The EPA’s estimates assume vehicles are in good working order. In reality, factors like tire inflation, air filter condition, and engine tune-ups can vary widely among vehicles.
• Data Collection: Fuelly’s data is based on user-submitted information, capturing a broad spectrum of driving conditions and habits. This provides a more comprehensive picture of real-world MPG than the EPA’s standardized tests.

A study by Consumer Reports found that real-world MPG often deviates from EPA estimates by as much as 10-20%, depending on the vehicle and driving conditions. This highlights the importance of considering both EPA estimates and real-world data when assessing fuel efficiency.

While EPA estimates provide a useful baseline, they should be viewed as a reference point rather than a guarantee. Real-world MPG is influenced by a multitude of factors, and individual experiences can vary. Consulting resources like Fuelly and monitoring your own fuel consumption can provide a more accurate understanding of your 2017 VW Tiguan’s fuel efficiency.

1.3 Impact of Different Tiguan Trims on MPG

How do different trims of the 2017 VW Tiguan affect gas mileage? Different trims of the 2017 VW Tiguan can have slightly varying effects on gas mileage due to differences in weight, features, and drivetrain configurations. Understanding these variations can help you choose the trim that best suits your needs and optimizes fuel efficiency.

The 2017 VW Tiguan was available in several trims, including S, SE, Wolfsburg Edition, and SEL. Each trim offers a different set of features, which can influence the vehicle’s overall weight and aerodynamic profile.

• Weight: Higher trims often come with additional features such as leather seats, sunroofs, and advanced technology, which can increase the vehicle’s weight. A heavier vehicle requires more energy to accelerate and maintain speed, leading to lower fuel economy.
• Drivetrain: The 2017 Tiguan was available with both front-wheel drive (FWD) and all-wheel drive (AWD) configurations. AWD models typically have lower MPG ratings compared to FWD models because the AWD system adds weight and requires more energy to operate. The EPA estimates for the FWD Tiguan are 20 MPG city, 24 MPG highway, and 22 MPG combined, while the AWD Tiguan is rated at 20 MPG city, 22 MPG highway, and 21 MPG combined.
• Features: Some trims may include features that improve aerodynamics or engine efficiency. For example, certain trims might have more aerodynamic body elements or engine enhancements that contribute to better fuel economy.
• Wheels and Tires: Different trims may come with different wheel and tire sizes. Larger wheels and wider tires can increase rolling resistance, which reduces fuel efficiency. Smaller, more fuel-efficient tires can help improve MPG.

According to Edmunds, the base S trim with FWD generally offers the best fuel economy among the 2017 Tiguan trims, while the higher SEL trim with AWD typically has the lowest MPG. This difference is primarily due to the added weight and the energy requirements of the AWD system.

A study by the National Resources Defense Council (NRDC) found that vehicle weight and drivetrain configuration are significant factors in determining fuel efficiency. They noted that reducing vehicle weight by 10% can improve fuel economy by 6-8%.

When choosing a 2017 VW Tiguan trim, consider how the added features and drivetrain options will impact your fuel consumption. If fuel efficiency is a top priority, opting for a lower trim with FWD can be a smart choice. However, if you need the added features or the enhanced traction of AWD, be prepared for a slight decrease in MPG.

2. Common Issues Affecting 2017 VW Tiguan MPG

What common issues can negatively impact the 2017 VW Tiguan’s MPG? Several common issues can negatively impact the 2017 VW Tiguan’s MPG. Addressing these issues promptly can help maintain and even improve your vehicle’s fuel efficiency.

• Faulty Oxygen Sensors: Oxygen sensors measure the amount of oxygen in the exhaust and help the engine control unit (ECU) regulate the air-fuel mixture. When these sensors fail, the ECU may not adjust the mixture correctly, leading to inefficient fuel consumption. According to the EPA, a faulty oxygen sensor can decrease fuel economy by as much as 40%.
• Clogged Fuel Injectors: Fuel injectors spray fuel into the engine’s cylinders. Over time, they can become clogged with deposits, resulting in poor fuel atomization and inefficient combustion. Cleaning or replacing the fuel injectors can restore proper fuel delivery and improve MPG.
• Vacuum Leaks: Vacuum leaks can disrupt the engine’s air-fuel mixture, causing it to run rich or lean. This can lead to decreased fuel efficiency and performance issues. Common areas for vacuum leaks include hoses, gaskets, and intake manifolds.
• Dirty or Failing Spark Plugs: Spark plugs ignite the air-fuel mixture in the engine. If they are dirty, worn, or failing, they may not provide a strong enough spark, resulting in incomplete combustion. Replacing spark plugs at the recommended intervals can maintain optimal engine performance and fuel economy.
• Malfunctioning Catalytic Converter: The catalytic converter reduces harmful emissions by converting pollutants into less toxic substances. A malfunctioning catalytic converter can create back pressure in the exhaust system, reducing engine efficiency and MPG.
• Engine Control Unit (ECU) Issues: The ECU controls various engine functions, including fuel injection and ignition timing. Problems with the ECU can lead to incorrect settings, resulting in poor fuel economy.
• Transmission Problems: Issues with the transmission, such as slipping gears or delayed shifting, can cause the engine to work harder, decreasing MPG. Regular transmission maintenance, including fluid changes, can help prevent these problems.
• Sticking Brakes: Brakes that are not fully releasing can create drag, forcing the engine to work harder to overcome the resistance. This can significantly reduce fuel economy.
• Exhaust Leaks: Leaks in the exhaust system can disrupt the engine’s back pressure, leading to inefficient combustion and decreased MPG.
• Incorrect Tire Pressure: Underinflated tires increase rolling resistance, making the engine work harder to maintain speed. Regularly checking and maintaining the correct tire pressure can improve fuel economy.

According to a study by AAA, proper vehicle maintenance can improve gas mileage by an average of 4.1%. Addressing these common issues through regular maintenance and timely repairs can help ensure your 2017 VW Tiguan maintains optimal fuel efficiency. If you suspect any of these problems, consider using diagnostic tools from CAR-TOOL.EDU.VN to identify and resolve them efficiently.

2.1 Diagnosing Fuel Efficiency Problems

What diagnostic tools can help identify fuel efficiency problems in the 2017 VW Tiguan? Several diagnostic tools can help identify fuel efficiency problems in the 2017 VW Tiguan, allowing you to pinpoint issues and address them effectively. These tools range from simple code readers to more advanced diagnostic systems, each offering different capabilities.

• OBD-II Scanner: An OBD-II (On-Board Diagnostics II) scanner is a fundamental tool for diagnosing engine-related issues. It can read diagnostic trouble codes (DTCs) stored in the vehicle’s computer, providing insights into potential problems affecting fuel efficiency. For example, codes related to oxygen sensors, mass airflow sensors, and engine misfires can indicate issues that need attention.
• Live Data Monitoring: Many OBD-II scanners offer live data monitoring, allowing you to observe real-time data from various sensors and components. This can help you identify irregularities in engine performance, such as abnormal readings from oxygen sensors, fuel trims, and coolant temperature sensors.
• Fuel Pressure Tester: A fuel pressure tester measures the pressure in the fuel system, helping you determine if the fuel pump is delivering the correct amount of fuel to the engine. Low fuel pressure can result in poor fuel atomization and decreased MPG.
• Compression Tester: A compression tester measures the compression in each cylinder of the engine. Low compression can indicate worn piston rings, valve problems, or other issues that reduce engine efficiency.
• Vacuum Gauge: A vacuum gauge measures the vacuum in the intake manifold, helping you identify vacuum leaks. Vacuum leaks can disrupt the air-fuel mixture and cause poor fuel economy.
• Multimeter: A multimeter can be used to test various electrical components, such as sensors and solenoids. It can help you identify issues like short circuits, open circuits, and faulty wiring that may be affecting engine performance.
• Smoke Machine: A smoke machine introduces smoke into the intake manifold, allowing you to locate vacuum leaks quickly and easily. This can be particularly useful for finding small leaks that are difficult to detect visually.
• Infrared Thermometer: An infrared thermometer can measure the temperature of various components, such as the catalytic converter and exhaust manifold. This can help you identify overheating or other issues that may be affecting fuel efficiency.

According to a study by the National Institute for Automotive Service Excellence (ASE), using diagnostic tools can reduce repair time by as much as 50%. By accurately diagnosing the cause of fuel efficiency problems, you can avoid unnecessary repairs and save time and money.

Investing in quality diagnostic tools from CAR-TOOL.EDU.VN can empower you to identify and address fuel efficiency issues in your 2017 VW Tiguan. Whether you are a professional mechanic or a DIY enthusiast, having the right tools at your disposal can make a significant difference in maintaining your vehicle’s performance.

2.2 Maintenance Tips for Optimal MPG

What maintenance practices can ensure optimal MPG for your 2017 VW Tiguan? Consistent and thorough maintenance practices can significantly contribute to ensuring optimal MPG for your 2017 VW Tiguan. Regular upkeep not only improves fuel efficiency but also extends the lifespan of your vehicle.

• Regular Oil Changes: Changing your engine oil at the recommended intervals is crucial for maintaining engine lubrication and reducing friction. Dirty or old oil can increase friction, causing the engine to work harder and consume more fuel. Consult your owner’s manual for the recommended oil change interval.
• Air Filter Replacement: A clean air filter ensures that the engine receives an adequate supply of air for combustion. A dirty or clogged air filter restricts airflow, reducing engine efficiency and MPG. Replace the air filter according to the manufacturer’s recommendations.
• Tire Inflation: Maintaining proper tire inflation reduces rolling resistance, which can improve fuel economy. Check your tire pressure regularly and inflate your tires to the recommended pressure listed on the tire placard or in your owner’s manual.
• Spark Plug Replacement: Spark plugs ignite the air-fuel mixture in the engine. Over time, they can become worn or fouled, resulting in poor combustion and decreased MPG. Replace spark plugs at the recommended intervals to ensure optimal engine performance.
• Fuel Filter Replacement: The fuel filter prevents dirt and debris from entering the fuel system. A clogged fuel filter can restrict fuel flow, reducing engine efficiency. Replace the fuel filter according to the manufacturer’s recommendations.
• Oxygen Sensor Replacement: Oxygen sensors monitor the amount of oxygen in the exhaust and help the engine control unit (ECU) regulate the air-fuel mixture. Faulty oxygen sensors can lead to inefficient fuel consumption. Replace oxygen sensors at the recommended intervals.
• Fuel Injector Cleaning: Fuel injectors spray fuel into the engine’s cylinders. Over time, they can become clogged with deposits, resulting in poor fuel atomization and inefficient combustion. Cleaning or replacing fuel injectors can restore proper fuel delivery and improve MPG.
• Regular Tune-Ups: A tune-up involves inspecting and adjusting various engine components to ensure they are functioning correctly. This can include checking ignition timing, adjusting valve clearances, and cleaning or replacing spark plugs.
• Check and Replace Fluids: Regularly check and replace essential fluids such as coolant, transmission fluid, and brake fluid. These fluids play a critical role in maintaining the overall health and efficiency of your vehicle.
• Inspect and Maintain Brakes: Ensure that your brakes are functioning correctly and not dragging. Sticking brakes can create resistance, causing the engine to work harder and consume more fuel.

According to a study by the Car Care Council, following a regular maintenance schedule can improve gas mileage by as much as 4%. By adhering to these maintenance tips, you can ensure that your 2017 VW Tiguan maintains optimal fuel efficiency and performs reliably for years to come. CAR-TOOL.EDU.VN offers a variety of tools and resources to help you perform these maintenance tasks effectively.

3. Driving Techniques to Maximize Fuel Efficiency

What driving techniques can help maximize the fuel efficiency of the 2017 VW Tiguan? Adopting specific driving techniques can significantly improve the fuel efficiency of your 2017 VW Tiguan. By modifying your driving habits, you can reduce fuel consumption and save money on gas.

• Smooth Acceleration and Braking: Avoid aggressive acceleration and hard braking. Gradual acceleration and gentle braking conserve fuel and reduce wear and tear on your vehicle. According to the U.S. Department of Energy, aggressive driving can lower your gas mileage by as much as 33% at highway speeds and 5% around town.
• Maintain a Steady Speed: Maintaining a consistent speed on the highway can improve fuel economy. Use cruise control when appropriate to avoid unintentional acceleration and deceleration.
• Avoid High Speeds: Fuel efficiency decreases significantly at higher speeds. Driving at or below the speed limit can save you fuel. The EPA estimates that fuel economy decreases rapidly above 50 mph.
• Anticipate Traffic: Pay attention to traffic patterns and anticipate stops and starts. By anticipating traffic, you can avoid unnecessary acceleration and braking.
• Use Overdrive Gears: Overdrive gears allow the engine to run at lower RPMs, which can improve fuel economy. Use overdrive gears when appropriate, especially on the highway.
• Minimize Idling: Avoid excessive idling. It’s more fuel-efficient to turn off the engine if you anticipate being stationary for more than a minute. Idling consumes fuel without covering any distance.
• Reduce Air Conditioning Use: The air conditioning system puts an extra load on the engine, which can decrease fuel economy. Use the AC sparingly or opt for the ventilation system when possible.
• Combine Trips: Combine multiple errands into a single trip to reduce the number of cold starts. Cold starts consume more fuel than warm starts.
• Proper Route Planning: Plan your routes to avoid congested areas and minimize stop-and-go traffic. Using navigation apps to find the most efficient route can save you time and fuel.
• Reduce Vehicle Load: Remove unnecessary items from your vehicle to reduce weight. Extra weight increases the amount of energy needed to accelerate and maintain speed.

According to a study by Natural Resources Canada, adopting fuel-efficient driving techniques can improve gas mileage by up to 25%. By implementing these driving techniques, you can maximize the fuel efficiency of your 2017 VW Tiguan and reduce your carbon footprint.

3.1 Utilizing Cruise Control Effectively

How can using cruise control effectively improve the 2017 VW Tiguan’s MPG? Utilizing cruise control effectively can significantly improve the 2017 VW Tiguan’s MPG, especially on highways and long stretches of road. Cruise control helps maintain a constant speed, preventing unintentional acceleration and deceleration that can waste fuel.

• Maintain Consistent Speed: Cruise control’s primary function is to maintain a consistent speed, which is one of the key factors in achieving optimal fuel economy. By preventing fluctuations in speed, cruise control ensures the engine operates more efficiently.
• Avoid Unnecessary Acceleration: Without cruise control, drivers often unintentionally accelerate and decelerate, leading to increased fuel consumption. Cruise control eliminates this variability by holding the vehicle at a steady speed.
• Reduce Driver Fatigue: Cruise control reduces driver fatigue on long trips, allowing drivers to focus more on the road and less on maintaining speed. This can lead to smoother, more consistent driving, which improves fuel economy.
• Use on Flat Terrain: Cruise control is most effective on flat terrain. On hilly roads, the vehicle may accelerate or decelerate as it tries to maintain the set speed, which can reduce fuel economy.
• Turn Off in Heavy Traffic: In heavy traffic, cruise control can be counterproductive. Frequent adjustments to the set speed can waste fuel. It’s best to turn off cruise control and drive manually in congested areas.
• Anticipate Traffic Conditions: Before engaging cruise control, assess the traffic conditions ahead. If there are frequent changes in traffic flow, it may be more efficient to drive manually.
• Maintain a Safe Following Distance: Always maintain a safe following distance when using cruise control. This allows you to react to unexpected changes in traffic conditions.
• Use Adaptive Cruise Control: If your 2017 VW Tiguan is equipped with adaptive cruise control, it can automatically adjust the vehicle’s speed to maintain a safe following distance. This can further improve fuel economy and reduce driver fatigue.

According to a study by Oak Ridge National Laboratory, using cruise control can improve fuel economy by as much as 7% on highways. By utilizing cruise control effectively, you can maximize the fuel efficiency of your 2017 VW Tiguan and enjoy a more comfortable driving experience.

3.2 The Impact of Speed on Fuel Efficiency

How does speed impact the fuel efficiency of the 2017 VW Tiguan? Speed has a significant impact on the fuel efficiency of the 2017 VW Tiguan, and understanding this relationship can help you make more fuel-conscious driving decisions. As speed increases, aerodynamic drag and engine load also increase, leading to higher fuel consumption.

• Aerodynamic Drag: Aerodynamic drag is the force that opposes the motion of a vehicle through the air. This force increases exponentially with speed. At higher speeds, the engine must work harder to overcome this drag, resulting in decreased fuel economy.
• Engine Load: As speed increases, the engine load also increases. The engine must generate more power to maintain the vehicle’s speed, which requires more fuel.
• Optimal Speed Range: The optimal speed range for fuel efficiency varies depending on the vehicle, but generally, fuel economy starts to decrease significantly above 50 mph. The EPA estimates that fuel economy decreases rapidly above this speed.
• Speed Limits: Adhering to posted speed limits can improve fuel economy. Driving at or below the speed limit reduces aerodynamic drag and engine load, resulting in lower fuel consumption.
• Highway Driving: On highways, maintaining a steady speed at or below the speed limit can significantly improve fuel economy. Use cruise control to help maintain a consistent speed.
• City Driving: In city driving, lower speeds and frequent stops and starts can reduce fuel economy. Avoid aggressive acceleration and hard braking to conserve fuel.
• Tire Pressure: Maintaining proper tire pressure is essential for fuel efficiency, especially at higher speeds. Underinflated tires increase rolling resistance, which reduces fuel economy.
• Vehicle Weight: Reducing vehicle weight can improve fuel economy, especially at higher speeds. Remove unnecessary items from your vehicle to reduce weight.

According to a study by the U.S. Department of Energy, each 5 mph you drive over 50 mph is like paying an additional $0.24 per gallon for gas. By understanding the impact of speed on fuel efficiency and making conscious driving decisions, you can maximize the MPG of your 2017 VW Tiguan and save money on fuel.

4. Modifying Your 2017 VW Tiguan for Better MPG

Are there modifications that can improve the 2017 VW Tiguan’s MPG? Yes, there are several modifications that can potentially improve the 2017 VW Tiguan’s MPG, ranging from simple bolt-on accessories to more complex engine enhancements. However, it’s important to consider the cost, potential benefits, and any possible drawbacks before making modifications.

• Low Rolling Resistance Tires: Switching to low rolling resistance tires can reduce the amount of energy required to move the vehicle, resulting in improved fuel economy. These tires are designed with a special compound that minimizes friction between the tire and the road surface.
• Aerodynamic Enhancements: Adding aerodynamic enhancements such as a front air dam, side skirts, and a rear spoiler can reduce aerodynamic drag, improving fuel efficiency at higher speeds.
• Engine Tuning: Engine tuning involves modifying the engine’s computer settings to optimize performance and fuel economy. This can be done by a professional tuner or with a handheld tuning device. However, it’s important to ensure that any tuning modifications comply with local emissions regulations.
• Cold Air Intake: A cold air intake replaces the factory air intake system with a more efficient design that allows the engine to draw in cooler air. Cooler air is denser and contains more oxygen, which can improve combustion and fuel economy.
• Performance Exhaust System: A performance exhaust system can reduce back pressure in the exhaust system, improving engine efficiency and fuel economy. However, it’s important to ensure that the exhaust system complies with local emissions regulations.
• Lightweight Wheels: Replacing the factory wheels with lightweight wheels can reduce the vehicle’s overall weight, improving fuel economy. Lighter wheels also reduce rotational mass, which can improve acceleration and handling.
• Synthetic Oil: Switching to synthetic oil can reduce friction in the engine, improving fuel economy. Synthetic oil is designed to provide better lubrication and protection than conventional oil.
• Fuel Additives: Some fuel additives claim to improve fuel economy by cleaning fuel injectors and improving combustion. However, the effectiveness of these additives can vary, and it’s important to choose a reputable brand.
• ECU Remapping: ECU remapping involves reprogramming the engine control unit (ECU) to optimize fuel delivery, ignition timing, and other parameters for better fuel economy. This can be done by a professional tuner and should be performed with caution to avoid damaging the engine.

According to a study by the EPA, some aftermarket devices can improve fuel economy, but it’s important to choose products that have been tested and verified. Before making any modifications to your 2017 VW Tiguan, research the potential benefits and drawbacks and ensure that the modifications comply with local regulations.

4.1 Aftermarket Parts for Fuel Efficiency

Which aftermarket parts are most effective for improving the 2017 VW Tiguan’s fuel efficiency? When considering aftermarket parts to enhance the fuel efficiency of your 2017 VW Tiguan, several options stand out for their potential impact. These parts often target areas such as reducing rolling resistance, improving aerodynamics, and optimizing engine performance.

• Low Rolling Resistance (LRR) Tires: LRR tires are designed to minimize the energy lost through friction as the tire rolls on the road. These tires can significantly improve fuel economy, especially during highway driving. Brands like Michelin, Bridgestone, and Goodyear offer LRR tires that are compatible with the 2017 VW Tiguan.
• Aerodynamic Kits: Aerodynamic enhancements such as front splitters, side skirts, and rear diffusers can reduce air drag, leading to better fuel efficiency at higher speeds. While the impact may be more noticeable on highways, these kits can also contribute to a slightly improved MPG in city driving.
• Performance Air Filters: High-flow air filters, like those from K&N, allow the engine to breathe easier by reducing air intake restriction. This can lead to a slight improvement in fuel economy and overall engine performance. These filters are also washable and reusable, making them a cost-effective option in the long run.
• ECU Tuning/Remapping: Professional ECU tuning or remapping can optimize the engine’s settings for better fuel efficiency. Tuners can adjust parameters such as air-fuel ratio and ignition timing to achieve improved MPG without sacrificing performance. Companies like APR and Unitronic offer tuning solutions for the 2017 VW Tiguan.
• Lightweight Wheels: Reducing the weight of your vehicle can improve fuel efficiency, and one way to do this is by installing lightweight wheels. Brands like Enkei and OZ Racing offer wheels that are significantly lighter than the factory options, which can lead to improved MPG and handling.
• Performance Exhaust Systems: While primarily designed for performance, certain exhaust systems can also improve fuel efficiency by reducing backpressure in the exhaust system. This allows the engine to operate more efficiently. Brands like Magnaflow and Borla offer exhaust systems for the 2017 VW Tiguan that can provide these benefits.

According to a study by the Society of Automotive Engineers (SAE), reducing vehicle weight and improving aerodynamics are two of the most effective ways to enhance fuel efficiency. By investing in these aftermarket parts, you can potentially see a noticeable improvement in your 2017 VW Tiguan’s MPG.

4.2 Legal and Environmental Considerations for Modifications

What are the legal and environmental considerations for modifying the 2017 VW Tiguan for better MPG? When considering modifications to improve the fuel efficiency of your 2017 VW Tiguan, it’s crucial to be aware of the legal and environmental implications. Modifications that violate local, state, or federal regulations can result in fines, failed inspections, and negative impacts on the environment.

• Emissions Regulations: Many modifications can affect your vehicle’s emissions, and it’s essential to ensure that any changes comply with emissions regulations. In the United States, the Environmental Protection Agency (EPA) sets emissions standards that all vehicles must meet. Modifications that bypass, disable, or alter emissions control devices are illegal.
• California Air Resources Board (CARB): California has its own set of emissions regulations that are often stricter than federal standards. The California Air Resources Board (CARB) requires that aftermarket parts be tested and certified to ensure they do not increase emissions. Parts that have been certified by CARB are given an Executive Order (EO) number, which indicates that they are legal for use in California.
• Local and State Laws: In addition to federal and state regulations, local laws may also restrict certain modifications. For example, some cities or counties may have noise ordinances that limit the use of loud exhaust systems.
• Warranty Implications: Modifying your vehicle can void portions of your warranty. Automakers may deny warranty claims if they determine that a modification caused the failure. It’s important to understand the warranty implications before making any changes to your vehicle.
• Environmental Impact: Some modifications can have a negative impact on the environment, even if they improve fuel economy. For example, high-flow catalytic converters may improve engine performance but also increase emissions of certain pollutants.
• Safety Considerations: Modifications that affect the vehicle’s safety systems, such as the brakes or suspension, can be dangerous and may be illegal. Ensure that any safety-related modifications are performed by a qualified mechanic and comply with safety standards.

According to the EPA, it is illegal to tamper with or remove any emissions control device on a motor vehicle. Violators can face fines of up to $2,500 per vehicle. Before making any modifications to your 2017 VW Tiguan, research the legal and environmental implications and ensure that you comply with all applicable regulations. CAR-TOOL.EDU.VN advises that you consult with a qualified mechanic or emissions specialist to ensure that any modifications are safe, legal, and environmentally sound.

5. Comparing the 2017 VW Tiguan MPG to Competitors

How does the 2017 VW Tiguan’s gas mileage compare to its competitors in the compact SUV class? Comparing the 2017 VW Tiguan’s gas mileage to its competitors in the compact SUV class provides valuable context for potential buyers. While the Tiguan offers a blend of practicality and performance, its fuel economy stacks up differently against various rivals.

• Honda CR-V: The 2017 Honda CR-V is a strong competitor known for its excellent fuel economy. The CR-V achieves an EPA-estimated 26 MPG in the city and 32 MPG on the highway for front-wheel-drive models. All-wheel-drive versions offer slightly lower figures but still outperform the Tiguan.
• Toyota RAV4: Another top contender, the 2017 Toyota RAV4, also boasts better fuel efficiency than the Tiguan. The RAV4’s EPA estimates are around 23 MPG city and 30 MPG highway for its gasoline models. The RAV4 Hybrid further improves these numbers, making it a leader in fuel economy within the segment.
• Ford Escape: The 2017 Ford Escape offers multiple engine options, with the most fuel-efficient being the 1.5-liter EcoBoost. This engine provides an EPA-estimated 23 MPG in the city and 30 MPG on the highway, surpassing the Tiguan’s ratings.
• Mazda CX-5: The 2017 Mazda CX-5 is often praised for its driving dynamics and stylish design. Its fuel economy is also competitive, with EPA estimates of 24 MPG city and 31 MPG highway for front-wheel-drive models.
• Nissan Rogue: The 2017 Nissan Rogue provides a comfortable ride and decent fuel economy. EPA estimates for the Rogue are 26 MPG in the city and 33 MPG on the highway for front-wheel-drive models, making it one of the more fuel-efficient options in its class.

According to Edmunds, the 2017 VW Tiguan’s fuel economy is slightly below average compared to its main competitors. While the Tiguan offers other benefits such as a comfortable interior and available third-row seating (on some models), fuel efficiency is an area where it lags behind.

A comparison by Car and Driver highlights that while the Tiguan provides a pleasant driving experience, consumers prioritizing fuel economy might find better options among its rivals. The Honda CR-V and Toyota RAV4, for example, consistently outperform the Tiguan in MPG tests.

When considering the 2017 VW Tiguan, it’s important to weigh its fuel economy against its other strengths, such as its cargo capacity and available features. If fuel efficiency is a top priority, exploring alternatives like the CR-V, RAV4, Escape, CX-5, and Rogue may be worthwhile.