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My dealer told me before leaving that I should run Premium and no ethanol. I have tried I tank of Regular Plus (88-89 octane) and could tell a difference in performance and ping noise. I have since been running nothing but premium.
The biggest problem I see now is trying to find the stations that aren't putting in the ethanol in all their products. I don't have the pinging noise with the premium and ethanol, but I have seen a decrease in MPG's because of it.
Outside of checking each station or calling around, has anyone found or even looked at how to determine who has pure gas vs. the gas with ethanol?
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Richard
’08 RL Midnight Blue, Blk/Tan Leather, 18” Polished Alloy Wheels
GMPP CAT Back Exhaust, Hahn-BSR Stage 1 Tune, K&N Filter, Tinted windows, Spoiler
Ordered 6/20/07 – Delivered 9/5/07
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