Ethanol /Premium Gas Mix 93 oct vs 92 Premium ethanol free

[husker boxster]

Don't worry about ethanol IF you know that it has been regularly used in the car since new. If you switch to ethanol after yrs of regular gas, the ethanol will loosen up any sludge on the bottom of your gas tank. Guess where that sludge goes? All thru your fuel system and clogs everything along the way. New cars or cars that have used ethanol regularly won't have the sludge so no worries. But older cars that haven't used ethanol will be trouble if you start using ethanol (a tank in a pinch won't kill you).

The loss of 1 octane for non-ethanol fuel will be worth the lack of headaches the above creates. Your car's computer will figure out how to map to the 92.

[Cunningr]

What about adding Octane Booster to the lower quality Gas?

I use Octane boost about every other tank, and try to use a Higher Octane Premium on the in between. Has to do with my location and trying to lower fuel cost and maintaining my performance.

[Gilles]

I would love to have that choice and run 91 ethanol free gas..