20W50 is a common viscosity grade for engine oils, suitable for older or high Motor Oil Sae 50
Lucas Hot Rod Classic SAE 20W-50 Motor Oil for a 1957 Ford Fairlane. Lucas Hot Rod & Classic Car Motor Oil SAE 20W-50 is Lubricheck Now EchoTechOilCheck oil analysis on MRS Premier Motor oil SAE 50 5w-30 vs 5w-40 (Part 1 Cruise) ...