Ethanol in fuel,,,UUUGLY subject!!!!! Many answers,all wrong,,,LOL...All correct.no perfect answer.How many of you are old enough to remember the term Gassahol,,,Yep we all started running Ethanol in gas WAY back in about 1975,and never stopped.My 1990 Johnson GT175,that I bought new still has the original fuel lines on it,yep all of them.The 1990 model fuel lines,VRO pump,every piece is labled ethanol resistant.Yep that was before Al Gore was even vice president.All that aside ethanol is not terrible in moderate amounts and regular use.Big trouble comes when a wholesaler adds too much at the distribution point,That does eat fuel lines up quickly.When I am using my boat regular I am not too much concerned with ethanol.Storage time getting close to the end of the season I only fill up with ethanol free gas.28 yrs and counting NOT any problems.I do not use any ethanol containing gas in my small engines,lawnmower,weedeater,and such..