I think the manual specifies 30 weight but any motor oil will do. It's just there to hold the solid debris that falls out of the air stream when the stream abruptly changes direction.

Fill it up to the line on the inside of the oil bath base.


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)