Question about oil/coolant warm-up temps on 3rd gen Ecodiesel

[mdnitram]

I have a 2022 Ram Rebel Ecodiesel. (original owner)
It's summer here in AZ and I just noticed that my engine oil and coolant temps warm up within 7 degrees of each other. I don't recall clearly but I am thinking this is new.
My other ram trucks it was coolant got up to operating temps first then oil lagged behind about 30 - 50 degrees.

Truck has a GDE tune, 119,000 miles, 4x4 with 3.92 gears.
I just replaced the water-pump, belt, idler and tension pulleys and flushed the coolant. No air bubble, it's been bleed thoroughly.

Is this normal?

 

[BigRedTD]

Yes. They’re typically 10-15 degrees off from each other.

 

[2021EcoDiesel]

Seems pretty normal to me. The oil in these trucks warms a bit quicker than its naturally aspirated counterparts. The turbo’s exposure to high temperature exhaust is the main reason for that in my experience.

That being said my trucks oil and coolant are almost always within 5-10°f of each other while warming up. The only time that difference increases is on the highway when the thermostat opens up. Then the oil usually rises to about 220°f while the coolant stays around 200°f.

 

[392DCGC]

Seems pretty normal to me. The oil in these trucks warms a bit quicker than its naturally aspirated counterparts. The turbo’s exposure to high temperature exhaust is the main reason for that in my experience.

That being said my trucks oil and coolant are almost always within 5-10°f of each other while warming up. The only time that difference increases is on the highway when the thermostat opens up. Then the oil usually rises to about 220°f while the coolant stays around 200°f.

It's the opposite IMO. The coolant is slow to warm up, partially because these small diesels don't output a lot of waste heat at no/low load, and the coolant/oil and very in-sync temp wise presumably through a heat exchanger of some sort. When I use the block heater in the winter, the coolant initally shows quite a bit warmer, and within a minute the oil & coolant temps quickly equalize.

 

[2021EcoDiesel]

Agreed in relation to the block heater, as the block heater primarily heats the coolant passage above the oil pan so the oil doesn’t absorb much of the heat until the engine is running and the cooler/heat exchanger in the radiator does its thing. Gotta love a thermally efficient engine!

 

[mdnitram]

Thank you for all the replies. It just seemed abnormal to me, I'm glad it's just different. My wifes Cherokee 2.0 turbo warms up like my old hemi. So I had a mini freak out.

I'm not worried about a head or anything like that as I get regular oil analysis' done and my last one 3000 miles ago was clean.

 

[2021EcoDiesel]

Also forgot to mention I have a GDE tune on mine as well. So your numbers are totally normal in my eyes.