Thanks Maz. I just came back here to apologize. I just read a related post that answered my question. I'll run her flat (if I can find some flat here in the Appalachians) at 65, make sure I'm up to 190 deg. f. and see what my delt t is.
Originally Posted by mazsecond
That doesn't sound too far off. You need to check your delta when the engine is at operating temperature and while cursing at 65mph with no trailer. If it is higher than 15 degrees I would start looking at a oil cooler and EGR delete, and while your at it switch to an ELC coolant. Their are a ton of posts on here about all of this, if you have any questions feel free to PM me.