Hi Andy
I have been running E10 in both my Harley and Z3 as they are rated to be able to run without issues.
Also, not sure if its psychological but am sure it runs better on E10
Possibly its because you put different fuel in (e.g. from a supermarket) rather than a premium fuel supplier (BP, ESSO, etc)?
ANYONE ELSE HAVING ISSUES WITH THE NEW E10 FUEL - LET US KNOW HOW YOU'RE GETTING ON WITH IT ?