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Old 08-03-2009, 01:48 AM   #10
Scooby Guru
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
1995 WRX
2015 F150


Originally Posted by wrxsti.l View Post
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

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.

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.


You're right of course but it's tough when you travel a lot and are filling up at unknown stations. When I use the same station all the time I can keep it much closer to zero.
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