I'll say it AGAIN and AGAIN and AGAIN, AMSOIL, AMSOIL, AMSOIL. I am a testament as to how durable this motor really is with even an underdrive pulley. Terry Haines has mentioned it's the lack of oil between the bearings and the crank that eventually lead to failures so the right oil will help greatly alleviate that to an extent.
Use Amsoil 0w30 motor oil change your filter frequently if you drive very hard like me and just be happy with a GREAT MOTOR, DMD or no DMD 
