I will be the first to admit, MMO is pretty much useless. Its red, and it smells neat I guess. The only things I used it for was air tool lube when I ran out of other stuff, and it makes a surprisingly good piston assembly lube when putting engines together. We used either old oil cans cut in half, or other similar container, put in about 3/4 inch of MMO, and dip the piston head in it and swirl it around to get the rings soaked well, and put it in the bore. Rings and bores seated very well with MMO.