If you are going to do an engine flush, definitely remove the pan and clean out all the sludge, first. No need to loosen up the crud that's already congealed at the bottom of the pan. Clean out the sludge in the oil filter canister, too. Then fill it up with the oil and diesel, etc.

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)