2006 Mazda 3 hatchback with 85k miles, automatic.
My MPG on a tank of gas that did 65% city/35% hwy was 23.67 mpg
I'll have another MPG for a tank of gas that is doing 80% hwy and 20% city tonight, will be about 3 mpg better.
Should I put a cold air intake on my car?
If so, why, and how much should I spend on one?
If not, why not?