My grandpa tells stories of MMO, he says it was invented to eliminate the "knocking" noise in the very first overhead cam engines (he's also a mechanic). He swears by it. He puts a pint in every oil change, and used to put it in the gas tank (before fuel injection). Anyway, point being, you're right, it couldn't hurt and I can see how it might increase engine life. 2-stroke engines require oil in the fuel. But does the extra oil bog it down at all or make it harder to tune? Does it smoke more? Also, is there extra oily discharge from the exhaust pipe?