Cold flow here is overrated

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Originally Posted By: TiredTrucker
Originally Posted By: Garak
Personally, in the worst conditions, I like having an oil pan heater in conjunction with the block heater. Some say they don't do much. I dare them to grab an oil pan heater's face when it's plugged in and on the vehicle in -40 weather. They won't do it a second time.


That's right. I am a big fan of oil pan heaters. Got sold on using them, and battery blanket warmers, when I live near Fairbanks AK for most of the 80's and early 90's. I would plug in the block heater, oil pan heater, battery blanket and the motor would start like a warm summers day at -50F. That is why it is so confusing to me, why folks who actually have to deal with some serious cold temps don't do similar. They will jump up an down about a 0 or 5 cold flow rating and worship at their favorite oil alter, but they will not do one of the simplest and most cost effective mods that will help their engine more than anything else... a block heater and oil pan heater. On a timer, hardly a bump in the electric bill. But will more than return it's cost in protecting an engine.


Great point - more than one way to skin a cat; a heater will work with any oil and at any temperature.
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Millions of miles and Alaska experience? You might know what you're doing.
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All the debate here about where a heater is located, does it heat this or that, etc etc - heat is heat. No matter which part of the engine you apply heat to, it will warm the rest. Maybe not by much, but every degree will help flow.

Shannow, great charts thank you. They explain a lot of this very well.
 
Originally Posted By: Kuato
Shannow, great charts thank you. They explain a lot of this very well.


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Got some more, posted here...
http://www.bobistheoilguy.com/forums/ubb...ed_#Post3881570

In the linked article, there's a statement regarding different starting temperatures.

I think block/pan heaters, when your ambients are at the limits of 5W, whether you run 0W or not, would pay for themselves in fuel saved.
 
All of my commercial diesels have exceeded the OEM designed in B50 life, with no major repairs, using a 15w40. One aspect to my comment that at extreme cold I will start the truck every 4 hrs and let is run for about 1/2 hr has more to do with fuel as it does oil. While I may not have a block heater plugged in away from home, I do have oil pan heater being used the majority of the time the truck is shut off in extreme cold. Oil flow is essentially a non issue. Not one motor I own, ag tractor, pickup, semi truck, etc does not have both block and oil pan heaters. Hence, my contention that I have felt no need to go to a 0xXX oil. While some my think it is stupid to not use a 0wXX oil in a motor these days, I counter that with the idea that it is stupid to not take advantage of what is available to make life so much easier for a motor, irregardless of the oil. Even with the best oil, heaters have a significant effect on starting issues when dealing with extreme cold.

But fuel, irregardless of the best fuel practices, using higher percentages of #1 diesel, properly using ant-gel products, etc, is the biggest factor to any decisions I make about my diesels in extreme cold weather. That 1/2 hr high idle (900 RPM) every 4 hrs properly circulates the fuel thru the filter, pump, and rail and returns warmed fuel to the tanks. Even under the best fuel practices, one can inadvertently get a fill of lame diesel even at the high volume, better truck stop locations. I have found running the motor at high idle for a 1/2 hr every 4 hrs in extreme cold has had a significant effect in reducing fuel related issues.
 
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