I towed my boat back to my house from my buddies last Saturday. Part of that trip included going over a small hill. I watched the oil temp and trans gauges. The oil got up to 219 degrees. It was 90 degrees outside at the time. The reason I ask is next weekend we're heading to Az and have a pretty decent hill to get over. I don't have an EGT gauge yet. It's in the plan though. Oh, my boat weighs about 5000lbs. I know the truck wasn't trying hard. I just want to keep an eye on things.