Quote:
Originally Posted by DEpointfive0
Quote:
Originally Posted by alcheng
Engine are design and tuned for certain spec/octane-value. For a normal OEM spec engine you won't get any difference between 91 or 94 since they are tuned for 91.
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I disagree with this point.
The car will advance timing, and adjust per current conditions... (Like anything else, intakes, exhausts etc.) |
Unless you tuned it and it requires 94, otherwise if the drivers manual says 91, 91 is as good as 94.
I tried both on the same car... no difference...