I think it did Paul. Both 5w-20 and 5w30 state this in the materials section of the MSDS:
2. COMPOSITION/INFORMATION ON INGREDIENTS
Ingredient(s) CAS Number % (by weight)
-------------------------------------------- ------------- -------------
DISTILLATES, PETROLEUM, HYDROTREATED HEAVY P
77.0- 87.0 64742-54-7
DETERGENT/DISPERSANT ADDITIVE
5.0- 15.0
VISCOSITY MODIFIER
1.9- 12.0
ZINC COMPOUNDS
1.0- 6.0
edit: I can't get it to line up right, but the base oil looks to be all group II at least (hydrotreated heavy petroleum)