‘24 2500 Laramie 6.7 Cummins Oil temp

[pkronenwett2001]

Hi all, I'm a first time diesel owner and have a few questions for those of you with 5th gen Cummins trucks. What is considering normal operating temp for oil when driving around not towing? I'm usually sitting at about 199-201 on highway without towing. Also when cooling down after driving what temp do you let the coolant and oil temp reach before shutting down? I’ve heard that 135 degrees Fahrenheit is the temp to let the oil warm up to before driving, is this true? Any guidance is greatly appreciated.

Thanks,
Pat

 

[Dodgeman]

Hi all, I'm a first time diesel owner and have a few questions for those of you with 5th gen Cummins trucks. What is considering normal operating temp for oil when driving around not towing? I'm usually sitting at about 199-201 on highway without towing. Also when cooling down after driving what temp do you let the coolant and oil temp reach before shutting down? I’ve heard that 135 degrees Fahrenheit is the temp to let the oil warm up to before driving, is this true? Any guidance is greatly appreciated.

Thanks,
Pat

I’m no expert, but getting the oil up to 135° would take a lot of idling. When the coolant temp is over 100, I go, easy at first until it gets in the 170-180 range. On a cool down, I usually let the coolant temp drop to 185-190 before shutdown. I don’t think the temp is as important as allowing time for hotspots to equalize.

I think I’ve read on this forum that there isn’t actually an oil temp sender, just some computer algorithm. I am also curious about what long time diesel experts have to say on this issue.

 

[AH64ID]

Anything the oil temp displays is normal because there is no sensor and the number is fake.

As far as warm up let it idle a few seconds and drive easy until it’s warm. Avoid cold idling.

Cummins considers more than 10 minutes of idle per hour of operation as excessive.

For cooldown I like my coolant to be below 200°, which sometimes takes forever if I’ve been towing. There is a turbo cooldown chart in the owners manual, and that’s sufficient for most every circumstance.