Quote:
Originally Posted by tigermack
That's the Sunol station. I don't think higher octane helps unless you have a tune that can run the higher octane.
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actually 94 octane does help... I don't know if the FR-S manual says it, but there is a place in the BRZ owner's manual (p. 420) that says:
Quote:
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The engine is designed to operate at maximum performance using unleaded gasoline with an octane rating of 93 AKI (98 RON) or higher. If 93 AKI (98 RON) fuel is not readily available in your area, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be used with no detriment to engine durability or driveability. However, you may notice a slight decrease in maximum engine performance and you may hear some knocking (pinking) of an engine while using 91 AKI (95 RON) fuel. Use of 91 AKI (95 RON) fuel will not affect your warranty coverage.
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So it is basically saying that if you run 91octane it's "ok" but 93 is best and what the engine is designed for.