Did someone say amsoil was made somewhere? I missed something
My point wasn't you should be rebuilding saws,
I was repairing saws people had normally ran to much oil in the gas, it lowers the octane of the fuel and causes detonation, when that happens chamber temps go wild and pistons gald to cylinder walls.
Luckily most of the time, the aluminum from the piston would be smeared over the chrome lining of the cylinder wall and could be flaked off, after that it was about getting the rings unstuck out of the ring grooves, once you had them loose you could often put new rings on it and get back to work, but occasionally they would require new pistons as well