Would a cheap filter fitted to the throttle body improve mpg's? I like this car just hate the gas mileage. 18-24 mpg avg the gas gauge dosen't work and I ran out of gas at 260 miles on a road trip. Any cheap or simple ways to improve gas mileage ? I try not to stomp on it and avoid red lights as much as possible. Tires are fairly new and properly inflated. Car is a 93 Eagle Vision TSI with the 3.5. I got the car from my aunt and it has been very well maintained. Has just over 160,000 miles. Tranny shifts kinda hard in reverse like it bucks sometimes. I just wanna drive this car as long as possible. Another question will a radio and 6 disc changer out of a Dodge Neon Expresso hook up to my factory plugs in my Eagle?