Detroit Diesel ONLY recommends 40 wt CF-2 oil for their two-stroke diesels. Newell recommends, at least in the '90's model 8V92's, Mobil 1 synthetic oil in 15w-40 grade. If your engine has always run on 40 wt oil, I would stick with 40 wt CF-2. I would NOT run multi-grade dino oil in a DD two-stroke.
It can be hard to find so I would get extra (in diesels, extra means 10+ gallons).
|