I've been running amsoil in everything the past few years and am perfectly happy with it. Very little oil consumption on the air cooled engines and using dino in them always resulted in needing to add nearly a quart in 100 hours on kohlers.
I've heard of Schaffer, friend of mine has told me about it. Trucking companies love the stuff I guess. He wants me to try some but their website doesn't really offer much information.
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