if I use E15 fuel does that give me my 91 octane? What is your question?
I have read that E15 ethanol based gasoline has an octane rating of 89 or better; does that
mean I can substitute it for premium
What makes this problem better or worse?
have not tried it yet
How long has your 1999 Mercedes-Benz SLK230 had this problem?
have not tried it yet
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