Question by grungeguy101: Poor Gas Mileage Mustang 2004?
My mustang has been burning more gas than usual. i drove 80 miles and it burned little more than half my tank. Its a v6 engine. can anybody help?
The spark plugs are new, the airfilter is good. what can it be?
no black smoke from the back is going out. the check engine light isn’t on. my mechanic said it was good but i really don’t think he looked at it that good

Best answer:

Answer by Joseph
look in the rear view are you belching black smoke? check engine light on? have the egr checked if that’s good then your computer may be going south. I knew of a car that you could fill it up and the tank would be empty at about thirty miles. changed all the sensors, the egr no avail, it was the computer

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