CarbonTremor
Well-Known Member
I use 93 as well, overall how do you like the 5 star tune? Seems like mixed reviews, I've been seeing some complaints of very harsh shifting.Most people see an increase in MPG, at least on highways, even with performance tunes.
Yea, the engine / transmission programming is more than likely retarded down due to EPA requirements.
5 Star is somewhat local to me, so I drove up there. Reset MPG prior to and leaving their facility.
Went from 16.2 MPG to 18.2 MPG using 70MPH on cruise control. 93 performance tune. I strictly used 93 before the tune as well. Keep in mind my poor MPG overall has more to do with my aerodynamics than the engine at this point.
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