FYI I saw a rep this week at a trade show. Told me that the bottom line is that all oil is graded, like diamonds, from 1 to 14 (highest). The Lucas oil is a Grade 12 plus it has some other secret additives. Regular oil is about a 6 or 8.
1949 Chevy 1/2-Ton "Sedgewick" In the Gallery 1989 Caprice