Quote:
Originally posted by acme
Half 87 and half 91 would be 89 octane..... 
Just add 87+91= 178 Divided by 2 = 89
5 Gal of 87 and 5 gal of 91 would still be 89 proof..
Alan
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I know, but the magazine article was saying that it resulted in a higher octane rating. It was a race team that raced Corvettes and they were saying that this would result in a higher rating. They gave some reasons but I just did it. Couldn't tell a difference. So math rules and they were probably wrong.