Is there any consequence filling 1/2 tank with regular in a 2.5GT?
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04-08-2006, 06:21 PM
450 whp 30R STI
Either drive around without going into boost until your really low and then fill up with 91/93 or you can put in some race gas (motorsport 109) and that will raise the oct. depending on how much you put in.
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