From Amsoil spec,
Motorcycle oil has higher (better number) than Vehicle car oil one.
MC to VC
VCC 40 : 152 to 123
VCC 100: 20,56 to 18,9
HTHS : 6,02 to 5
Flash Point : 240 to 233
Pour Point : -39 to -36
Noack Volatil : 3,89 to 6,5 (lower better)
4 Ball Wear Test : 0,37 to 0,40 (lower better)...