I used the E10 fuel on a 10 day 2000 mile trip round Europe last June, albeit on my 1100 Yam, I didn't notice any difference in power, fuel economy, crispness of power delivery or cold starting problems. I was fully loaded with panniers and camping gear and did all the passes and fast back roads, as well as 550 miles in one day to Epernay in the Vosges mountains, so not hanging about.
We had the same scare stories about unleaded fuel when that came out. My old fella used it in his '61 Royal Enfield Crusader Sport from the day it came out and monitored valve clearances and has reported that all the hype was just that ....hype. I hope E10 is the same ...hype.
What its like in my Honda? dunno yet
