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Old 08-03-2009, 01:33 AM   #9
wrxsti.l
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Member#: 156973
Join Date: Aug 2007
Chapter/Region: International
Location: Adelaide, Australia
Vehicle:
2002 ADM WRX STi
STi Black/Blue

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Quote:
Originally Posted by 69subaru360 View Post
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.
Don't get me wrong, I am not saying E10 is a poor performer, I have had great results using it - I just wanted to point out it has quality issues and your tune should factor that in for engine longevity

Quote:
Originally Posted by 69subaru360 View Post
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%.
5% min is what you want. 10% is too high and you are sacrificing a lot of your headroom and limiting your margin of safety.

Quote:
Originally Posted by 69subaru360 View Post
Some people shoot for 2% but that can be difficult.
On E10 I had around <2%, on straight pump I have <1% - and that is with non-standard larger injectors

It is all in the tune. Spend a little time on it and less than 5% is not that hard - even with inconsistencies in fuel quality.

Leslie
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