Do Aftermarket Air Intakes Improve Gas Mileage?
When considering ways to improve your vehicle's gas mileage, several factors come into play. One of these is the use of aftermarket air intakes, particularly cold air intakes. This article delves into the effectiveness of these modifications and provides practical advice on how to achieve the best results.
Understanding the Impact of Aftermarket Air Intakes
Aftermarket air intakes are designed to provide a more efficient air flow to the engine, which can potentially improve gas mileage. However, the actual impact can vary significantly depending on the specific model of your vehicle and the way you modify it. Here are some key points to consider:
Optimizing for Fuel Efficiency
To truly optimize for better gas mileage, you should consider a combination of elements beyond just the air intake:
Ensure you use 93 octane or a higher grade of fuel to provide better performance and combustion. Keep the air intake filter clean to ensure optimal air flow. Use full synthetic oil, which is less resistant than conventional oil and can help improve efficiency. Follow a recommended oil change interval, typically between 3000 to 5000 miles, to maintain engine performance.Important Considerations
It's crucial to be mindful of the specific conditions and components in your vehicle:
Check the condition of gaskets before installation. If they haven't been replaced in over 100,000 miles, consider replacing them. Use top-tier octane fuel to protect your fuel pump and engine components from damage. Avoid using 87 octane or fuel with 10% ethanol, as it can cause phase separation in the fuel tank and quicken the deterioration of fuel-efficient engine technologies like the ecoTech turbo and GDI engines.Experiences and Tips
One prominent example involves a 5.8 L V8 engine where the author experienced a significant improvement in fuel efficiency. By implementing a y-pipe split exhaust with only two of four catalytic converters and no muffler, the author managed to increase their fuel economy from 12 miles per gallon (mpg) to a range of 17-19 mpg. This not only improved gas mileage but also enhanced the vehicle's performance, although it came with increased noise levels.
In some cases, more extensive modifications may be necessary. For instance, high flow catalytic converters paired with a stock muffler or stock catalytic converters with an aftermarket muffler, or even modifications to the headers, might be required to achieve optimal results. Often, a well-calibrated cold air intake can make a noticeable difference in both gas mileage and overall performance. A professional mechanic can help fine-tune these components for maximum effectiveness.
Cautionary Notes
Certain factors can negate the benefits of an aftermarket air intake. For instance, if the cold air intake is used on a four-wheel-drive (4WD) vehicle designed to drive through flood waters, it might actually impair the vehicle's performance. Additionally, if the air intake is raised above the expected water levels, it may pose a safety risk. Similarly, some supposedly beneficial air intakes may only serve to increase the manufacturer's profits without enhancing the vehicle's performance.
It's important to thoroughly research and consider all aspects before making modifications to your vehicle's air intake system. Consulting with professionals and carefully weighing the benefits against the possible drawbacks can lead to a more informed decision.