Inside block paint
Why red primer and not just red paint??
The Glyptol is very very resistant to oil and even, as said above, a good hot tanking. This stuff dry's in a way that leaves the surface tighter than other things like paint and primer, which can flake off into the engine. It will last and last and last...
Oil wise, IMO, without getting crazy and splitting hairs which is the best oil, I'll just say a quality oil and a zinc additive, like in example, a bottle from Comp Cams ethier in a additive bottle of zinc or zinc oil. AKA Break in Oil.
Joe Gibbs has been thrown around here as of late. I wonder about the Rototiller SP!!!!!!!