jdm_dynasty said:
well, of course modifying to increase hp will lose extra gas. it's just common sense. but since you have a cat-back, the ratio would be different. i'm not sure how much difference it is since i don't have a cat-back. i don't want to say something that i don't even know so i'm sure other members could explain to ya.
Not necessarily true. Most bolt ons make your engine more effcient. So in actuallity, many mods can actually increase your fuel economy. This assumes you drive the same way, not open it up to hear your new exhaust every stop sign.
Also, yes, it's a good idea to keep the rpms down. But if you are flooring it and shifting at 3k, verses 1/8 thottle shifting at 5k, your going to see better mileage at 5k part throttle. Load will eat up gas way quicker than rpm. Of course if you don't drive a stick, your tranny will only stay in gear under load.
A/C, tire pressure, clean airfilter, etc are good ones. That and taking out any excess weight and all that.
But........The key is to not drive like an ***. If you slam the breaks, you probably slam the gas as well. Don't weave through traffic, on and off the gas, when you hit a light, pull alway like your gramma, etc. And when you come to a red light, slow down ahead of time and hope it turns green. Do this at every light, etc. That will get you more mpg than anything.