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Like sw20kosh said, Torco is best additive IMHO. Unless something new has come out in past couple years that is better (if so I haven't heard of it, though I wasn't messing with performance cars past coupla years due to "family" vehicle obligations). Torco is designed/bottled and marketed as fuel octane additive. It does work. However, most fuel additive is no good and barely raises octane if at all. I never use any other brands besides Torco.
There are "home made" brews you can do like Toluene... It is toxic (as is Torco) so don't breath it or get it on your skin. But if you add a gallon or two each fill up it can raise 93 octane up to 94-95.
[ame="http://en.wikipedia.org/wiki/Toluene"]Toluene - Wikipedia, the free encyclopedia[/ame]
If you add homemade brew like Toluene only add a gallon or two to each fill up.
Last edited by Captain Insano; 06-26-2013 at 10:37 PM.
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