deeptekkie
Junior Member
I've run all 3 grades, (87, 89, and 91 octane) and haven't noticed a difference in performance/ fuel mileage. The only difference was the added cost of the higher grade fuel.
The ECU was tuned to run on 87 octane, so that's what I run. I try to avoid Ethanol laced fuel which is getting difficult because E-10 is basically everywhere. I do notice a bit more pep, and fuel economy when I can find 100% pure, unadulterated gasoline without any of that ethanol crap.
Total agreement!