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Doesn't that f with the cat sensors?
how much?
Damn I can't believe Wilson has posted in here yet...
A person with a late model SRT Charger, with a data system, said he got the least knock retard with 50-50 blend of Exxon 93 octane and Gate 89 octane ethanol-free gas.
He stated that Shell had the greatest knock retard of all the major gasoline brands. I too had heard that from a tuner in south Florida.
I know a few places in Jacksonville with ethanol-free 89 octane gas, but don't know where I can get ethanol-free 93 octane gas. Is there a north Florida location with ethanol-free 93 octane gas?