"For your money you get less mileage, and lower octane. "
As I remember, in the past, Indy cars rans on pure ethanol. They could run high compression without "pinging" and the engine ran cooler. I think that that indicates higher octane rating. Here in the GWN Sunoco 260 contains lots of ethanol. It doesn't knock and gives wonderful results on an e-test.
The need to fill the tank came frequently at Indy in the day.
Waaay back when- the first gas shortage- ethanol was new to gasoline. Gas tanks that had only ever seen all petrol fuel, had a little water mixed with rust in the bottom. The first tank of ethanol mix then incorporated that water and rust into the fuel. Carb rebuilds were frequent.


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sorry for the rant!
