jarrod_234 asked: This is not a question about how to save gas.. the quetions is for a mechanic or pro…every car reaches it opt mpg a diff speed i drive a 2007 honda civic 1.8L with 5 speed manual with stock trans and gears.Free mortgage quote Sphere: Related Content

Chris H asked: I wanted to know so i would know what all i could do to my car without dipping to low in the mpg range, thank you.thats sick Sphere: Related Content

karate09 asked: I am wanting to replace the stock fuel injectors. However, I was wondering if buy a larger fuel injector would lower my mpg or if it would increase my mpg? All information regarding fuel injectors and how they get clogged and fuel economy will be greatly appreciated.fuel injection Sphere: Related Content

OstTimber asked: I hear from a lot of people, that I should change headers in my car. In my opinion, it will not be too expensive for manufacturer to make them a little wider (so exhaust gas could flow faster). Than why do manufacturers do not provide cars with them? I am thinking to change [...]

fckxux02 asked: I have a stock 240sx, 1994, non turbo. I was wanting to get a cold air intake and mandrel bent exhaust to help with a little power, sound, and MPG. How many miles to a gallon should i expect from each of those? I’m trying to figure out how long it would take [...]