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Old 04-10-2017, 03:01 PM   #18
WoodBoss
"Old School"
 
Drives: 2010 2SS L99
Join Date: Apr 2015
Location: Sherrills Ford, NC
Posts: 1,294
After my tune from DynoSteve the gas mileage was very similar to before the tune, I lost 0.5 mpg on the highway. I have a 13 mile stretch of highway I set the cruise control to 70 and zero out the fuel consumption reading, then at the end of the stretch I check it. I'm still at 24 mpg after my last tune.
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