Starting your tractor in the winter.

[DarkBlack]

It may be and old explanation, but it is 100% proven. UPS trucks shut down more for fuel savings, not as much to reduce wear. Not every revolution results in equal wear.

What I meant is that the reason you don't no load idle a cold diesel is from wear factors related to incomplete combustion, not from the wear of metal to metal. Also as others have stated you are wasting expensive fuel, and total cost of ownership includes the fuel. UPS knows this.

 

[rsallen]

Golly gee Tom,
Now that you've saved the crankshaft and rods what are we going to do about the rest of the engine?
You could pre-oil everything you want before start up, you could pre-heat the engine even, do anything you want, you'd still only add some x amount of hours/miles to the mechanical package.

And no has said all wear was caused equally.

 

[TomSeller]

Golly gee Tom,
Now that you've saved the crankshaft and rods what are we going to do about the rest of the engine?
You could pre-oil everything you want before start up, you could pre-heat the engine even, do anything you want, you'd still only add some x amount of hours/miles to the mechanical package.

And no has said all wear was caused equally.

Golly gee rsallen,
When I put "Haha" at the end it means I am not serious.

 

[buickanddeere]

If wear is not related to rpms or to the number of turns (what in the world does 'the number of turns' mean?) then engines would last for ever.

Let's get this straight, every single revolution of an engine causes wear. I don't care how many different ways you want to cut it or how the revolutions are made whether by hand, starter, at idle or under load....you are going to have some wear on the engine.

Wear not related to the number of revolutions is one of the most inane things I ever heard.

Wear IS NOT directly proportional to rpms .
An engine at rated rpms of 1800rpm making 80HP but rated at 100HP. That 1800rpm engine will outlast the otherwise identical engine operating at 1440rpm both engines making 80HP.
The higher torque loads,higher combustion pressure/stress and higher heat will wear out the 1440rpm engine first.

 

[buickanddeere]

I think what he is saying is that every revolution of the engine does not cause the same amount of wear as every other revolution. First turn of the engine after being dry for a month will cause more wear than any single revolution in the middle of a day's work. I *think* that's what he meant.

That too

 

[buickanddeere]

I was going to reply to him. Thanks for saving me the time

Don't twist the words. I said wear is not a linear relationship to rpms and number of turns. Depends on the amount of engine load and temperature to name just a few factors.
Engine life is not a finite number like grains of sand in an hourglass.

 

[tcreeley]

I go by the temperature gauge in the winter when it is below 20- I like to see the needle creep up before I go. Below 10 I always give it some time. I warm up at about 1200-1400 rpm. Too fast- just pushing a cold engine and that makes no sense (no computer controlling things like on my Chevy). I think it warms up faster at a lower rpm than a high- engine sounds better too. And all this even though it stays plugged in.

 

[grm61]

It may be and old explanation, but it is 100% proven. UPS trucks shut down more for fuel savings, not as much to reduce wear. Not every revolution results in equal wear.

The drivers are required to shut them down and lock the doors when not in the truck..safety and security, I'm sure there is some fuel savings there as well.

 

[TomSeller]

The drivers are required to shut them down and lock the doors when not in the truck..safety and security, I'm sure there is some fuel savings there as well.

Right, forgot about that.

 

[dave1949]

The drivers are required to shut them down and lock the doors when not in the truck..safety and security, I'm sure there is some fuel savings there as well.

Our UPS driver shuts off the engine anytime he leaves the driver's seat. We are not much of a security threat in our driveway , so I'm guessing it is more about safety. I don't know how much fuel is being saved in the 15 seconds it takes him to scan and hand our package out the door. I always go out to the truck if I'm home.