thebulgd

iTrader: (6)

I'm in Cali and can only get 91 at the pump, I can get some sunoco 104 unleaded but don't know the formula for mixing. Would a 50/50 mix make it 97.5 octane? I just want to get it to about 93 octane since I have knock problems and I don't want to mix with xylene or whatever.

thanks for any help

HILL_SS

iTrader: (4)

Im interested in this also! TTT for ya!

DuronClocker

iTrader: (25)

Yeah just average them, so if you put in equal parts of each, you will be right in the middle of the two octanes.

thebulgd

iTrader: (6)

so if I add 3gal of 104 to 14gal of 91 (3+14=17) I would have 93.29 octane gas, yeah?

or did I screw that all up?

DuronClocker

iTrader: (25)

Yes sir

racecar

I do it all of the time due to 11.5 compression. I add 5 gal of race fuel at home, then 5 gal of pump gas the next time I drive by the gas station.