Quote:
Originally Posted by brianbot5000
I read a lot about these too - ironically, it's why I didn't get a 335i. Nice huh?
In any case, I'm not sure it explains why the sound goes away when you use non-ethanol fuel. I know there have been mixed reports, but overwhelmingly the folks who use non-ethanol fuel don't have this issue.
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I don't know about FA20.
But E85 is used by N54 community for a long time. It increase the boost and reduce knock.
I would say, yes, check the FA20 fuel system see how they handle ethanol.
Btw, Don is running E85 on his BRZ-400.