Quote:
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Originally Posted by husker boxster
So to stir the pot a bit more, which would be better?
91 octane
or
93 octane with 10% ethanol
We only had 91 around here but saw the 93 blend recently.
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I did this experiment with my previous car (toyota solara). The car recommends 91 octane (but can take 87 with some engine output reduction/increase fuel consumption per owners manual). I put 91 un-oxygenated fuel when I was in Minnesota and I put 93 with ethanol when I moved to MI. No noticeable power difference, but 91 with no ethanol returns at least 2-3 MPG better on highway.
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