I used Marvel Mineral Oil in the 70's but I don't think it did anything except empty my wallet. I tend to think of using additives in cars that are on the verge of dying and I want to eek out a few more miles. Not to say it's bad stuff or will hurt anything. I just think it's unnecessary. But hey, a paper oil filter is good enough unless you extend the oil changes. And many won't run their Crossfires with a paper filter. Use the Lucas and let us know in 5 more years.

Les