RE: After-run oil question
After an extended search for a suitable after-run oil for my YS, I finally found some Red Line 75W90. The Red Line web site states that this is an ester based oil, so it should be fine. There is a definite smell of molybdenum disulfide, so as a precaution I'm soaking a piece of silicone tubing to check for swelling. If the Red Line passes this test, I'll try it in the YS.