Hi guys newbie here

just purchased a 2015 M5 with competition package

regarding gas: I have always preferred non ethanol laced gas, 93 octane

I am in Florida for a while and 93 octane non-ethanol gas is hard to find.

What is better for my M5:

93 octane with ethanol, or

90 octane ethanol free ??

If I can not get ethanol free 90 octane, should I get ethanol free 87 octane, or 93 octane with ethanol ??



As you can tell, I hate ethanol


Thanks for your help

Cobra Catcher