So I grabbed myself a 32oz jug of MMO the other night at the parts store, because I've read several things about it over the years. Now I'm seeking advice for the best ways to use it on my '54. I've got a 223 inline 6 in there with solid lifters. The car has ~65,xxx miles on it and it's all original. I've been out driving it around, and was wondering if I should put any MMO in the oil, or in the gas tank? Tips and advice appreciated!