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octane booster is garbage....dont use it. its a waste of money and better off justgetting the 91. all the gas is the same. it all gets pumped here in the same giant tube, the difference is the additives. when the cheveron guy pulls his truck up to fill up he hits the cheveron button and chevron additives, same with arco, shell, 76, exxon, citco, and whatever other gas stations you can think of. stay away from the boosters.
i wouldnt. i would just get a 91 tune. 20 points of octane boost.....how much horse power are you missing really? i would get a 91 tune and not have to worry about it.
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