Originally Posted by Bikeguy Joe
Ethanol in fuel will eat rubber components if there is too much, but unless they have upped the content to 25% or more, you have no worries.
Better fuel because it's higher octane? I doubt it, more likely you are getting a higher quality fuel where you buy it, and in all probability ALL the fuel they sell is a good quality.
What brand are you using?
all gasoline sealing rubber products since the 1980's are ethanol friendly and won't hurt a thing... 10% ethanol gasoline mix has been around since the 70's.. this goes for common stuff, I don't know about the china engines, but I know if you go to the parts store for fuel hose or a carb kit, it's ethanol compliant