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Old 08-03-2009, 01:19 AM   #8
Scooby Guru
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
1995 WRX
2015 F150


The 93 octane E10 we get here is really good stuff. I have great results with it, it's very knock resistant. But it can vary in quality. On E10 I'm happy if my fuel learning stays within 10% tank to tank. That's what learning is there for, differing fuel quality. On straight gasoline I try to keep learning within 5%. Some people shoot for 2% but that can be difficult.
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