If you've got a half tank or less just fill it up with 87 octane and just push it too hard. Forget the additives.... at least that's my advice.
EDIT: Actually if you have a 1/4 tank or more go a head and fill it up with 87, if you've 3/4 of a tank top it off with 85. If you do put in an additive do NOT use anything which increase the octane... you need something that's easier to burn not harder.
Last edited by cre; 04-30-2008 at 07:51 PM.
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