has anyone tried an after-market octane booster?
just curious if they do actually boost octane (if yr already running a 98 or 100), and also if the gains are noticeable and cost effective.
(by the way, Toluene is a great octane booster, but just close yr eyes and ears if they happen to mention the carcinogenic properties....) (oh yeah, it also destroys rubber fuel lines)
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