I run 10W-40 detergent in my 50 216, and I probably change it too often, but it seems to be working great. Keeps getting cleaner with every oil change too. I changed it 3 times last summer with the 200 miles I've put on it after firing it up, after a 15 year nap.
Last edited by 4100 Fire Truck; 02/27/2019 8:01 PM.
