quack44

Hi guys a few weeks ago i put a urp fender well cold air intake on my 89 mustang gt it is all stock except it has cherry bomb pro mufflers and no more cats. Before the intake i was getting 150 to 165 miles on a full tank and now with intake i`m getting 130 to 140 any help would be great thanks.

93mstang

Well one reason might be is the gas, have you changed where your getting your gas from?

quack44

no i always get gas at chevron and i get the plus grade every time,i heard from a lot of guys not to go with cheap gas because it will give you less mpg than good gas.

Bullitt520

Well first off typically an intake will help mileage.
Another reason could be that you changed your driving style as a result of the new sound and power....

93mstang

ya true. Driving more aggressive will sharply decrease your mpg. Esp cold air should be giving you better mpg. I always stick with either shell or bp because of the high ethanol that they have in their gas. This will def give you more mpg and make your engine run better.

94Yellow50

cel isnt on is it?..make sure you had all sensors plugged back in and everything tight?

86 5.0L

:facepalm:

LCBlackDep183

LOL: a 10% ethanol mix in your fuel will not change your MPG significantly. If anything it will just have different exhaust products.

Check your install: Make sure your hose clamps are tight, your sensors are plugged in, your filter is on tight.

Check your driving: Your foot is the number one thing that will contribute to poor gas mileage.

86 5.0L

:facepalm: x 2

ethanol has a way lower BTU then gasoline(meaning drastically less MPG), corrosive to regular engines, and is a net-loss product

anyway back On Topic, shouldnt a CAI actually decrease MPG? colder air is denser therefore has more oxygen, more oxygen will need more fuel to keep the correct A/F mixture, thus more fuel is injected into the engine...

Jerome99

I'll pretend I didn't hear that, the opposite is true you burn more fuel.

I think you have your foot in the gas a little harder, did you pull the codes?