Fluids Warm-Up

[eTorqueCoasting]

Ok, so engine fluids, like oil and coolant. Lately, it's been getting chilly my way, so now there's a bit of consideration to let the truck warm up a bit. I'm about 2-4 min from the highway, depending on how I'm driving. By time I get to the highway, my coolant temps, according to instrument cluster are 100+, but my oil temps are still below 100. Doesn't the oil have more or closer contact with the hot bits of the engine? I would think my oil would get warmer sooner than the coolant.

 

[SD Rebel]

I think water heats up much quicker than oil, especially since the water is used primarily as the cooling source.

That's normal however, typically oil takes 2-3 times longer to get up to temp than coolant, even during the summer. My coolant will get up to 200F within 2 miles, my oil takes about 5-7 miles to do the same.

However, once up to temp, oil will typically stay within 10F higher than coolant in the normal drive cycle without a load. With a heavy load under heavy throttle, water can get up to 245F while oil can shoot up to 290F, this is under extreme of normal operation.

 

[c3k]

The water heats up quickly because the thermostat closes and keeps the water on the block and away from the radiator until it gets up to temp.