Here's what can and will happen if we continue to use gas with alcohol in it.
Alcohol mixed in gas will mush up the rubber gaskets, causing leaks, and collapsed fuel lines, so it's good to avoid gasohol.
This is my 55Husky or was my husky. Now its junk.
As you can see in the first pic the head casket was weakened from the alcohol and allowed air to enter the jug making the saw run to lean. Eventually destroying the piston. Just to expensive and to old of a saw to repair.