[Fulltiming]

High shear strength and low ash are the primary issues when dealing with the two stroke Detroits. My '92 Newell has the original metal plate in the engine compartment showing Newell recommended Mobil One. I believe they put Mobile One in the new engines when they were delivered. I have always used Delo 100 40 weight as that is the recommendation of the old 2 stroke Detroit mechanics.

I applaud anyone willing to do some serious testing of theories.