[Scott H in Wheaton]

Old Ford flathead oil is a lot like Chicago politics.

"Vote early and vote often"
"doesn't matter who you pick, its always the same old BS"

so change your oil often, and because these old engines have fairly loose tolerences and run kind of dirty they will work fine on just about any type of clean oil...detergent/non-detergent. single viscosity vs multi-viscosity, 30w vs 50w