Quote:
Originally Posted by Rukee
Mixxing half and half with 92 octane, if I'm doing the math right would get you 103 octane, which would be awesome for the `65, I could bump my timing back up to were it should be. 
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I've got a friend with a Lightning. He did a pulley swap on it. He mixes 93 octane at 1 gallon Toluene for 9 gallons of gas to get 95 octane in the summer only. I guess as the enigine temperature gets higher it wants to detonate more. Down here in the summer heat he was getting massive timing pulled because of the heat build-up. This mix cured it. As soon as it gets above 80 he starts adding. He said he gets slightly better mileage too, but it's a 1/2 mpg bump on a 12mpg vehicle, nothing to write home about.
That would be good stuff for old cars as long as it wouldn't tear up the rubber in the fuel system. I don't know about that, you might want to check before you do it.