1/2 91octane 1/2 100octane
Jun 15, 2004 | 04:08 PM
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From: "The OC"
1/2 91octane 1/2 100octane
I have been running 100 octane (76 Cool Blue ) in my Evo now and it is much happier. Since we have crap gas and I love my car too much to feed it **** I have been mixing 7 gallons of 100 and 7 gallons of **** ( I mean 91) with great results. Does anyone know the formula for figuring the exact Octane rating by doing that? 
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