Join Date: Oct 2014
Vehicle: 2005 SLK350 Automatic; Comfort package, Premium package, 6 disc changer, heated seats. Black on bla
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[QUOTE=dapersianboy;3315882]Do you think I can run e85 on my stock 2006 slk 55 Amg[/QUOTE]
I'm surprised that our more knowledgeable members haven't responded so if I misspeak here, feel free to correct me.
In answer to your question, unless your SLK was built as a flex-fuel vehicle (which I highly doubt), burning E85 would be highly ill-advised. Ethanol attacks and deteriorates rubber items in the fuel system unless they are designed to be compatible with ethanol. And there's a real possibility that your ECU would have to be re-mapped and your compression ratio changed in order to get any appreciable increase in performance if that is what you are after.
I drive a flex-fuel vehicle and my experience has been a dramatic reduction in mpg with no noticeable improvement in performance. I used E85 for the first two years of ownership simply because my home state subsidized my usage. If it were not for that, even though (at the time) E85 was cheaper than the lowest grade of gasoline, it would have been more costly to use because of the reduction in miles per gallon. When the subsidy went away, I no longer used E85. And yes, I know that race cars run on pure ethanol but their engines designed specifically for that.