I also use Shell Rotella 15w-40 and the Walmart brand in all my old vehicles.

It should be noted that the Shell Rotella 15w-40 is formulated for deisel engines and should NEVER be used in vehicles with catalytic converters. The extra zinc in the deisel oil, which was removed from oil formulated for gasoline engines, will ruin catalytic converters.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)