The lead fouls plugs also. Nasty stuff. Why not just add a little octane booster to that 90 octane you can get? Also you could ask that dealer whether the echo / stihl stuff is ethanol friendly. Please do if you get a chance - we would like to know. Hopefully most anything you can by nowadays except for the old neoprene is okay for ethanol. So perhaps you do not need to shy away from the gas with ethanol in it. Let us know what they say about the two types of tubing and ethanol. Thanks.