For what it's worth, at least in our small engines, I wouldn't make a habit out of running MMO regularly in either oil or fuel. I used to run a small amount of MMO in every drop of gas that I put into my machines. Now, however, I only do it once every couple fillups. As far as oil, as Roland said, at least in my opinion, I'd only run it for a short time to clean things up, not a permanent additive. I'm sure others will have thoughts on this and that's what makes this country great!
