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View Poll Results: Which gas will perform better?
91 octane, pure gasoline 2 28.57%
93 octane, 10% ethanol 5 71.43%
Voters: 7. You may not vote on this poll

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Old 02-21-2009, 06:06 PM   #1
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91 octane gas or 93 octane E10 ?

It looks like I have a choice between 91 octane gas, or 93 octane E10. What would you choose?

If I understand it right, the 91 has more energy. However, the E10 shouldn't pre-detonate as easily, which apparently lets the ECU advance timing for max power.

I'm primarily interested in performance, but also problem avoidance.

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Old 02-21-2009, 07:09 PM   #2
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Go with what's recommended in your owners manual...always.
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Old 02-21-2009, 08:02 PM   #3
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93 E10 is all we can get in WI, no issues after 75,000 miles on BP Premium. My car (when out west) runs like crap on 91.

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