I run schaeffer's or rotella 10w40/15w40 "diesel" oil in almost everything. I have had good luck out of schaeffer's for the past 15+ years running in everything from factory daily drivers to my race quads and bikes. Since my injury, I been using the local quick-pit for ease on my daily driver srt8. They only carry the 10w40 rotella. Been running it for 100,000 miles in the daily and works fine. Both the rotella and schaeffer's have additives for the flat tappet cams (most cams). My thing is to change the oil and maintain the engine when I suppost to and not get lazy with it.
