Octane Booster posted by JConcepTTZion on September 14, 2005 at 11:29 PM
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Look in Sport Compact Car, where the did tests at an idependent lab. AS DISCUSSED RECENTLY at twinturbo.net, they found several octane boosters that actually move California gas from 91 octane to 93 octane. (Ash's Z is incorrect in his post.)
There have been other tests at other labs, and you can find that info online. Make sure you find a booster that works in the test.