Originally Posted By: Rand
Originally Posted By: 2010_FX4
Originally Posted By: expat
I'd run 15w-40 but that's just me.
+1 - Rotella T would serve the purpose quite well. On OPE what can be gained by using a synthetic oil? Certainly, it would not be used to extend the OCI. What are the thoughts here? PS - OP, I would also change the oil at 5 hours.
Doesn't break down as fast at 300F
I would just change it more often versus using a synthetic--but if the oil is that hot, either the cooling is not working as it should (water cooled) or the engine is being ran for too long (air cooled).