Quote Originally Posted by cww View Post
.......... You can't run multigrade oil in 2-stroke detroits it will shear down and result in scoring the liners and pistons. Schaeffer makes a full synthetic CF-2 that is good.
Explain this phenomena please. 2strokes have much tougher duty on liners/pistons? A modern high speed 4stroke diesel that makes 2-3x the HP per displacement is "easier" on the oil?