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Originally Posted by Vigilante375
Honestly, if you're going to boost the power of a vehicle in any shape or form. MPGs shouldn't be a concern.
All I'd want to know is what I'm doing going to put more wear and tear on something else so I can upgrade it at the same time, how much more power I'm going to be making and how reliable will it be plus getting good parts at a reasonable price.
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that in already know... my question was because I've seen many people say they get better mpg with a tune when driving normally. that didn't make sense.. and the replies here confirm my thinking... performance tunes won't give better mpg, just because you're not on the throttle.