So here is the deal, Echo warrantied an 8010 blower for me. The piston got scored. I ran the fresh 50:1 with walmart oil. I used this same mix in Stihl chain saws, husky trimmers, tanaka trimmers, and redmax 8500. I have NEVER burned up a motor in my life. The dealer was very helpful and the machine got warrantied, but he did suggest I use the Red armor mix. But, holy crap, $75 for a gallon of it? I bought it, but good grief, that seems crazy. Bought in bulk like that, it is still 2x the price of the Universal from Walmart. I am not sure if "bobistheoilguy" has done research on this, but is it really worth it?