Hi Steve:

___For Mobil1 Synthetic as well as some of the other Synthetic’s competitors, you can pick the various attributes right off the manufacturer’s web sites. If you cannot find a particular oils kinematic viscosity at both 0 and 100 degrees C from the manufacturers website, hit BITOG or use Google. Here are the two most well known synthetic manufacturer’s kinematic viscosity numbers for you to compare too.

Kinematic Viscosity of Mobil1 SAE 0W-20 (ASTM D-445)
cSt @ 40 degrees C = 43.0
cSt @ 100 degrees C = 8.4

Kinematic Viscosity of Amsoil SAE 0W-30 Amsoil (ASTM D-445)
cSt @ 40 degrees C = 56.9
cSt @ 100 degrees C = 11.2

Kinematic Viscosity of Mobil1 SAE 5W-30 (ASTM D-445)
cSt @ 40 degrees C = 53.0
cSt @ 100 degrees C = 9.9

Kinematic Viscosity of Amsoil SAE 5W-30 Amsoil (ASTM D-445)
cSt @ 40 degrees C = 63.4
cSt @ 100 degrees C = 11.7

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net