I purchased my first diesel in 1981 and started using Kendall D-3, 15-40 in it. We bought our second diesel in 1982 and ran the same oil in it. Both of these vehicles lasted 300,000 miles and the camshafts looked like brand new. I have now been running one form of 15-40 diesel oil in everything I own for 32 years. I run it in all my air cooled engines; chipper, yard vac, riding mower, etc., and have had no issues with any of them. I even run it in my 9.8 Tohatsu 4 stroke outboard. Are there engines I would not run it in? Yes, but I do not own any airplanes.
Part of my decision to run this oil in everything came after a long drunken discussion with 2 friends in 1984. They were oil engineers with Chevron.
Randy
