engine oil temp

part of the oils "job" is to help cool the engine besides lubricating. you have a high horse power engine, probably one of those anti smog choked engines, that run hotter. check the owner's manual (if there is one), and i will try some searching myself and get back to you when i can about this.

here is only a little bit more info:

 

That is perfectly fine for a Cummins engine. There is/was an FAQ on cummins website and that was one of the questions and they answered with oil temps running right where yours is running. Cat's oil temps are cooler, because I believe their temp sensor is measuring AFTER the oil has gone through the oil cooler.

 

Sounds like a sensor isnt working right. You could have a tech take a reading with a gauge if you are worried. 240f is too hot no matter what, when not climbing hills or something.

 

The two posts above are a perfect example of trucking: Its OK, NO its not.

 

Had the same thing. Oil temp 35-40 degrees higher than coolant temp, oil pressure drops as it thins out. Try running fan on manual. When warning buzzer for low oil comes on turn up radio.

 

I'm just repeating what Cummins says is OK on their website.

I once thought my N14 was too hot because it was running 220 on flat ground and approached 240 on long pulls. I changed out the cooler, the cooler thermostat, the truck thermostat, and even tried synthetic oil. Then I discovered Cummins says it is perfectly normal. So I wasted my money on that stuff.

Btw, I did all that right after I got the truck at just past 500,000 miles. I currently have 1,513,000 miles on this engine. It has not been overhauled. Do i need to say more?

 

I don't doubt you, my comment was about you saying its OK and the next post says it not OK.

 

do not ever hesitate to ask your boss or the mechanic specific questions. it doesn't show that you are dumb or stupid, it shows you are humble enough to admit you don't know everything and you WANT to know many things........!!!!!