Is there much you can do for an 07 tahoe as far as mileage is concerned? i know with diesels a lot can be done but not too sure how much improvement can be made on a gasser. i already own a V2 so all i would need is the tune done. Thanks!!!
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To see the most in MPGs, I would recommend a higher octane (good quality at that). If all your are looking for is MPGs, I wouldn't bother with a tune if you are only running 87.
She is about through her first tank of 89 octane...only picked up about .5 MPGs. If i stuck with running the 89 octane would you be able to help any with a tune?