I'm partial to Kendall / Conoco Phillips, but to each their own....
I would suggest 20w50 or a 15w40spec.
Some people swear by a straight wt. 30, 40, or 50.
Funny how these engines have their own personalities and preferences ....
Use what your engine reacts the best to, change it regularly, and enjoy...


(2) 1954 3100's / foster parent - SOLD
1955.1 3100 Resto in progress
1971 GMC 2500 Custom / foster parent
1951 M37 Lawn ornament
1949 3800 Panel Resto in progress
1959 GMC 100 LB Fleetside