Frank Wiesmann

I saw this gas at a gas station near my house and was wondering wether I could use it in my car without problems.

Lynn

Yes, but why waste the money on gas with an octane you don't need and can't use to any benefit?

amdeutsch

WTF. The only stuff we get around here with kind of Octane is E85. And that is not racing fuel either.

dtkw

Just don't use anything lower than the book said. Anything over is a waste of your pocketbook. Even the ECU tuned only need 93 rating. However, it's your money.

amdeutsch

In my neck of the woods premium is 91 Octane. E85 is ~100 Octane and about 35 to 40 cents cheaper than premium. Low down is ~10% reduction in mpg but no performance loss. What would you do? BTW I drive a C320; flexible fuel capable.

mleskovar

"In my neck of the woods premium is 91 Octane. E85 is ~100 Octane and about 35 to 40 cents cheaper than premium. Low down is ~10% reduction in mpg but no performance loss. ."

Help me understand this....the higher octane is cheaper? And 10% reduction in mpg using higher octane? Wha?

E55AMG99

Depending on your car, it won't hurt anything but your pocketbook. Won't help unless the best fuel you can get is the 91 crap they sell in California. I mix about 25-50% in a tank to boost octane to 93-95 for my ECU modified E55. It performs much better as indicated on the G-Tech. My ECU modified CLK430 doesn't perform any different between 91 and 100 so I don't bother.

Steve Clark

It's 85% ethanol,and is available in the midwest.Ethanol is what raises the octane and lowers the price at the pump.Ethanol can be made from anything that ferments... corn,wheat, barley, rice, whatever.
Your mileage drops because ethanol has a fewer BTU's per gallon,ie less energy per gallon.
Unless your car is designed for E85,don't use it.

bamberger_1

I dont know where Frank lives, but in Germany Shell started to offer 100 Octane Race gasoline (Ferrari is the sponsor in that campaign). A resent test of the German car club ADAC shows no change in Milage, performance or anything, but only a bigger hole in your valet, since the price is about 10% higher than premium. For older cars which dont have octane sensors it does not matter at all, for the never once the changes of performance etc. were with in the measuring tolerances (~1%). This gas has nothing to do with ethanol.