Quote:
Originally Posted by 07_335i_AW
Those octane levels look correct. The way to calculate it is:
Race gas oct. rating x Gallons of octane + pump gas oct.rating x gallons of octane.
Total from above / (divided by) total gallons in tank = octane rating
soo for .. 1 gal race/16 gal 91= 91.5 broken down is 100x1 + 91x16 = 100+1456= 1556 /17 = 91.5
Hope this helps
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+1 I use the same system to bring NC standard 93 up to 95 octane with a 93/100 mix