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Just wondering what you guys are seeing on your stangs as far as gas mileage with a custom tune from americanmuscle.com? Im thinking of buying one but I'm wondering what it does to the mileage.
 

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I have the 2011 V6 with CAI and tune. Mainly drive with the 89P. Getting about 23.8 city and 28 highway. The other day I cruised at 65 mph on the highway and got 33 mpg.
 

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In theory, mileage should at least slightly increase due to the engine running more efficiently. In reality, it probably won't due to the power increase making your right foot a little heavier.
 

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It's better by 2-3 mpgs on average, but you get vroom happy o_O, also putting big fat radials on the back never helps... :laugh:
 
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