The only snake oil stop-leak product I have ever had success with is Lucas power steering stop leak. It has permanently stopped ps leaks in two of my vehicloes for years.

As for stopping main seal leaks or others in an engine, I have never had success with any that I've used.


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)