An engine flush will do next to nothing for gas mileage. Next time they ask you if you want an engine flush, say no.
Anyways on to your problem; when is the last time you did a tune-up? If you can't remember it is probably time to get one done! If it was done recently, I would bring it into a shop and have the oxygen sensors scoped out as well as a few other critical sensors on your engine.
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Tuesday, July 28th, 2009 AT 5:03 PM