Quote:
Originally Posted by VTEC
Well you don't have to fill the whole tank with 100, that would expensive and overkill. But you can mix 100 with 91 to get 93 octane. There's a chart posted somewhere on here by one of the California members that shows you how many gallons of each to mix in order to get whatever octane you are looking for.
But an easier way might be just to order a case of octane booster and add some to each fill up
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Why? Unless you are going to tune for it higher octane than 93 does nothing at all for you.