I run Rotella T6 5W40 full synthetic, in every engine I have... Diesel and gasoline ... Liquid cooled and air cooled. Before switching to Rotella T6 I always used Delvac1 (Mobil Oils full synthetic diesel rated)
...Have been doing it for well over 100,000 miles in a few cars and trucks and thousands of hours in tractors and mowers... Annual oil changes in everything... :smile:KennyV