So, is everyone running 10/40 using Amsoil, or are you telling me the weight you use, regardless of the brand?
I've noticed that most engine manufacturers have gone to 5/30, meaning they have gotten away from high heavy end numbers. Maybe 20/50 is too thick at lower temps?
AND, I forgot, is 126.50 a case too high?
!0-40 Make sure it is MCF (motorcycle formula)