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How about 91 octane, will that increase milage or performance??


If you engine does not *need* 91 octane (which it doesn't), then no increase in mileage or performance. It will just empty your wallet faster...

hupptoy


99 4Runner SR5 3.4 Auto 4x4, 32" LTX A/T, 154K
93 Toy x-cab 22RE 5-spd 4x4, 31" LTX A/T, 150K