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Originally Posted by kannibul Save your money and just get 91 out of any gas station that carry's "name brand" fuels. Anything over that, unless you have a timing advancement
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05-07-2010, 12:43 PM
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#7 (permalink) | |
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A True Z Fanatic
Join Date: Jan 2010
Location: San Jose, CA
Posts: 4,236
Drives: 370z/STI/EVO X/IS-F
Rep Power: 24   |
Quote:
VQ37 can run higher octane fuels without a tune. 91 octane is just the MINIMUM recommended octane. You can get more power out of a slightly higher octane. The ECU will automatically adjust the timing/fuel trim curve for the best power/economy to a certain extent, meaning that since 91 is the highest grade premium found in some states, use of a higher octane fuel will yield small power gains and trigger the ECU to adjust timing as a result. However, I wouldn't recommend running higher octane (92+) all the time, since better mods can be purchased for the same price as a few fill-ups with high grade premium. I also wouldn't recommend running higher than 96 octane or a 91/100 mix, since the ECU will most likely not be able to adjust itself to the 100 octane race gas, and 100 octane race gas is damn expensive. Just make sure it's unleaded unless you want to kiss your O2 sensors goodbye. Last edited by SE; 05-07-2010 at 12:45 PM. |
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