I don't start to feel heat until my temp is above 150°

 

That's because they have more coolant to heat up to reach operating temp...

 

It all depends here. Like this week we are in the 40s.

But I usually let my vehicles warm up good in the winter before I drive them. I like to see coolant temps above 100 before I take off.

 

I don't think so. You can't heat up 60 lbs of coolant without also heating up 1,000 lbs of iron and steel. Heat goes from the cylinder to the block where it's picked up and circulated by the cooling system. That circulation evenly distributes the heat around the engine block until it gets warm enough to open the thermostat and bleed heat through the radiator.

It's a simple issue of mass and combustion. The V10 weighs around 600 lbs and has a less efficient combustion cycle than the 1,000 lb PSD. An extra two quarts of coolant doesn't make a darn bit of difference.

 

Either way, there's more of everything to heat up on the Diesels. More oil, iron, and coolant. It's going to take longer.

 

Yup,

It's either in the garage, or i run that SOB until its toasty warm! I ain't getting in a cold truck.

 

That's too long, do you have the right thermostat?

 

How much more? And why is there more?................still doesn't sound right to me.

 

I agree.............again.

 

It always seems so ironic that you live in Alaska but hate being cold. I guess becoming homeless is never going to happen.

 

So wait, you don't agree its mass, and then later on another post you agree its mass. Lol ok

 

Diesels have higher thermal efficiency than gasoline engine (a higher percentage of the diesel is converted to work rather than heat). So there is less "waste" energy in form of heat that goes into the coolant. This is another reason it takes longer for diesels to heat up in addition to those already mentioned.

 

now you got me interested. I don't think I've ever actually used the heater in my X...or my old 6.0 either

gonna check it out one morning this "winter"

 

my truck runs at 185 on the obd2 scanner. It gets warm fast, but doesn't put out really hot heat until I hit the highway. Perhaps my stat has been changed in the past?

 

Here in the midwest, I love my V10. At -6, I can fire it up, punch the butt warmer and leave the heat off. By the time I've scraped the windshield the temp gauge has popped up. With front and rear blasting I can be in short sleeves and jeans in less than 5 miles. If a big gasser is taking forever to heat, might be a good time to have your coolant checked.

As a truck driver I can tell you a diesel isn't gonna get hot until it idles awhile. Best advise for PSD owners is let it get the oil circulated and go. Putting it under load is the only way to heat it up fast.