Re: oil

[Anonymous]

TCW oils use a base stock oil of (thin) 10W or less (thinner) 5W. Way to thin for motors using crankshaft rotary valves to have the valves seal well. Also motors using bushings instead of bearings need the thick oil to protect the bushings against bearing loading and wear. Therefore the recommended 40W (Shell Aero 80W )=to 40W non detergent auto oil oil should be used in bushing and or rotary valved motors or Kendall Oil 30W(base stock) two cycle marine oil that has the additives of a modern marine TCW oil , but is not a TCW oil.