Clayten

^^ Actually the real king of starting in winter is the Detroit 2 stroke. As much as I despise them they sure start good in the cold.

N.Johnson

That is only true if they are plugged in and you spray ether....been there done that!

DiezelSmoke

I have 30+ years also as a diesel wrench and I use to believe the same thing with summer 15w-40 and can tell you from recent experience that 5w-40 runs cooler than 15w-40 in the summer time.....Guaranteed.

Nor_Cal_Angler

that may be true....but who's lives are in whos hands.....i can tell you this...after a nice fire...i get the biggest N.Y steak!!!!!

NCA

TexasCTD

That is good to hear, because im now running Shell Rotella 5w40 year round. I know I can tell a big noticeable difference on cold starts over 15w40........if you can call 20-30 degrees a cold start.

I just hope they keep the 5w40 Rotella as a ci-4+ blend and not switch to CJ.

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jimlj

I just read the section in my owners manual (You know that thing in the glove box nobody ever looks at?) about starting and warm up. It basically says when you get oil pressure to drive easy till you get up to temp and not to idle for over 10 minutes as the engine will get too cold and start to coke the rings and injecters, and fuel will wash past the rings and get in the oil (like others have said in this thread)

I always start the truck, and when the engine smooths out I start driving. I have always believed it was no harder on a engine to drive easy till it's warm than to idle in the drive way when it's cold.

DiezelSmoke

CJ will also work just fine.

TexasCTD

I think there is still some debate about that, particularly if you go over 5k Oil Change intervals. Here was a long (old) thread discussing that topic. https://www.dieseltruckresource.com/...d.php?t=136899

and an article on TDR about it.... http://www.turbodieselregister.com/TDR57_Oil.pdf

I know when I went to Rotella CJ blend 15w40 my TBN dropped basically in half from the CI-4+ Rotella. That is why I switched to the 5w40 because, for now, it is still the CI-4+.

Not arguing with you........im sure the CJ blend has to work. I tried it for 2 oil changes. I just feel more comfortable with the higher TBN of the older blend in my pre-07.5 truck.

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wcbcruzer

I typically let it idle for 30 seconds then drive off slow till the needle moves.

levigarrett76

I crank it over and redline it as soon as she fires to blow out the carbon

fanbrain

If 10 minutes is too long, why do truckers run their stuff overnight? Does the fuel wash happen only when the ambient temperature is below a certain point?

The sticker on the drivers side sunvisor says to wait 30 seconds before you drive. Good enough for me. In the summer, ambient temperature at 7AM is 90* anyway...

levigarrett76

because they want heat/ac

its not a good thing for any engine

chipmonk

bingo! but lots of trucking companies are trying to get them to stop, as it's costing them BIG $$$ in extra fuel costs, and additional maintenance/repair costs. in-truck generators and plug-in generators at truck stops are much cheaper alternatives.

Haulin_in_Dixie

In the summer I really don't warm it up, just get the oil pressure up for a few seconds and then drive off easy. In the winter... I live on a dead end road a quarter mile long before hitting the highway. Both the Dodges and the big truck, I start them let air and oil come up full, ease off in first gear and let it idle out the road, generally it has started moving the temp gage by the time I get to the highway. Cummins says not to put a load on it until the needle moves. I don't feel that a bobtail tractor or the dodge has a load on it idling in first gear.

renopker

when I'm on the road with mine I never shut it off ,I idle all night with the heater or the air on the fuel it uses is far less the a motel room.that why I went to the Horten elect clutch on the fan instead of the stocker worms up faster and cools better with the 10 blade fan when needed and produces no drag on the motor when not engaged.