Quote:
Originally Posted by SoCalM6GC
All of these octane boosters will maybe bring 91oct to 93oct and 93oct to 95oct but at the same time they will foul your plugs and leave colored deposits on the plugs from MMT and other ingredients they use. You're better off throwing 4 gallons of E85 in.
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I thought the limit with E85 is like 1-2 gal. I’ve tried to do more and have had “drivetrain malfunction” and the fuel pump couldn’t keep up.