Xxyion
Well-Known Member
Oh there will definetly be a difference in performance at sea level. however based on the manual it looks like Toyota says its safe to run any octane rating (whithin reason). It does not mention that performance would stay the same nor would i expect it to.If we are discussing running 87 octane on vehicles closer to sea level, there will be a difference in performance. There’s a reason why tuners will only tune for 93 (or in my circumstance crappy California 91) or higher.
As OP posted earlier, the higher octane helps with knock resistance, another reason why people prefer running premium gas or E85. I will admit that OPs elevation plays a role in his circumstances, so I will concede to that debate. If there is no benefit in going with a higher octane fuel under his circumstances (I.E. noticeable power difference or minimal fluctuations in knock resistance), then go for it.
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