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AC/Delco light duty diesel oil 0w-20 #4798926 06/27/18 02:00 PM
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Rat407 Offline OP
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Looks like you can get the new AC/Delco 0w-20 diesel oil that is recommended for the new 3.0 Duramax diesel engine coming out in the 2019 Silverado and Sierra in Jan 2019.

ACDelco 0W20 dexosD Light Duty Diesel Engine Oil
To Chevrolet, Buick, GMC and Cadillac U.S. Dealers:
0W20 Light Duty Diesel Engine Oil dexosD is the recommended engine oil for the 2019 3.0L LM2 Duramax Engine on the Chevrolet Silverado and GMC Sierra.
The product is currently available for ordering from the GM Oil Distributor, and the details are as follows:
​Product Description
​Package Size
​Part Number
​XOM Material Number
​Dealer Price
​ACDelco 0W20 dexosD Light Duty Diesel Engine Oil
​Quart (6 X 1)
​19370138
​124144
​$4.31


2002 Silverado 5.3 5w-20 AMSOIL
Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4798961 06/27/18 02:46 PM
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dlundblad Offline
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Can you run a 5w40 Dexos2 if 0w20 isn't available?


03 Jeep WJ 4.0 208k
02 Volvo S60 2.4T 199k
97 Chevy Blazer 4.3 175k
04 Audi A4 3.0 210k

Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4798964 06/27/18 02:49 PM
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SavagePatch Offline
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Do you think that there will be a viscosity/approval change down the road?

Like how the Ram EcoDiesel 3.0l changed from 5w30 C3 to 5w40 CJ-4. I've actually been considering using a 15w40 synblend for a 5k OCI.

Re: AC/Delco light duty diesel oil 0w-20 [Re: dlundblad] #4798966 06/27/18 02:50 PM
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Rat407 Offline OP
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Originally Posted By: dlundblad
Can you run a 5w40 Dexos2 if 0w20 isn't available?



I'm sure you can. Will it effect the engine performance, only GM knows. I bet they are doing this mainly for CAFE purposes. This is a completely new design from GM. So not sure what the oil system consist of until it gets released.


2002 Silverado 5.3 5w-20 AMSOIL
Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4798972 06/27/18 02:53 PM
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skyactiv Offline
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FCA did switch from 5W30 to a 5W40 as stated above. GM should just use the same oil specified for the Chevy Cruze/Equinox diesel which is a 5W30.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 18' Elantra Sport 6 speed manual
The rude guy that points out reality


Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4798982 06/27/18 03:03 PM
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racin4ds Offline
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You'd have to be a moron to put that water in any diesel engine! I'm sorry but if this isn't CAFE driven I don't know what is...

Go ahead, I'll bet a paycheck engines begin failing left and right and the switch to a 5W40 comes very shortly from GM.


Just say NO to thin oils and M1!
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Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4798983 06/27/18 03:05 PM
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Snagglefoot Offline
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popcorn Wow. The high vis guys are going to go crazy!


If you want the job done right......do it yourself.
Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4799014 06/27/18 03:47 PM
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SavagePatch Offline
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What's the tow rating for the 2019 Silverado/Sierra? What's the Duramax 3.0l's HP and Torque?

Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4799023 06/27/18 04:04 PM
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maxdustington Offline
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Originally Posted By: Rat407
Originally Posted By: dlundblad
Can you run a 5w40 Dexos2 if 0w20 isn't available?



I'm sure you can. Will it effect the engine performance, only GM knows. I bet they are doing this mainly for CAFE purposes. This is a completely new design from GM. So not sure what the oil system consist of until it gets released.


I thought this was the same Dmax that is available down under? Dang, brand new design?

Who would run the 0W20 in that? Seriously!


99 Toyota Tercel CE 5EFE/C151
PUP 5W30/Ultra
Re: AC/Delco light duty diesel oil 0w-20 [Re: racin4ds] #4799029 06/27/18 04:16 PM
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Rat407 Offline OP
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Originally Posted By: racin4ds
You'd have to be a moron to put that water in any diesel engine! I'm sorry but if this isn't CAFE driven I don't know what is...

Go ahead, I'll bet a paycheck engines begin failing left and right and the switch to a 5W40 comes very shortly from GM.


The same moron that purchase it new and follows GM's recommendation to keep it in warranty. Like I stated above it is a completely new design straight six diesel and being built in Michigan from my understanding. No other information is being released. So no torque or HP specs or even fuel economy but GM is stating that we will not be disappointed and it will be better than the Ram and Ford 1500 diesel.


2002 Silverado 5.3 5w-20 AMSOIL
Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4799051 06/27/18 04:40 PM
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Should we wonder when the 20w will be upped to a 30 or a 40wt?


2015 F150 2.7
2018 F350 6.2
Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4799053 06/27/18 04:41 PM
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Originally Posted By: Rat407
Originally Posted By: racin4ds
You'd have to be a moron to put that water in any diesel engine! I'm sorry but if this isn't CAFE driven I don't know what is...

Go ahead, I'll bet a paycheck engines begin failing left and right and the switch to a 5W40 comes very shortly from GM.


The same moron that purchase it new and follows GM's recommendation to keep it in warranty. Like I stated above it is a completely new design straight six diesel and being built in Michigan from my understanding. No other information is being released. So no torque or HP specs or even fuel economy but GM is stating that we will not be disappointed and it will be better than the Ram and Ford 1500 diesel.
GM is the heart Break of America.


2015 F150 2.7
2018 F350 6.2
Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4799057 06/27/18 04:44 PM
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dustyroads Offline
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I would guess that this oil will be something similar to FA-4 oils with an HTHS of 2.9-3.2 (???) and not like a PCMO 0W20 that is 2.6(ish). smile

Plus it's an inline 6, which will probably have bigger bearings than the V-6 diesel in Ram and Ford.

Last edited by dustyroads; 06/27/18 04:49 PM.

2013 F150 XLT 5.0 4X4 122k miles
Re: AC/Delco light duty diesel oil 0w-20 [Re: dustyroads] #4799074 06/27/18 05:03 PM
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nthach Offline
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Originally Posted By: dustyroads
I would guess that this oil will be something similar to FA-4 oils with an HTHS of 2.9-3.2 (???) and not like a PCMO 0W20 that is 2.6(ish). smile

Plus it's an inline 6, which will probably have bigger bearings than the V-6 diesel in Ram and Ford.

If anything, I don't own a diesel engine but didn't Detroit Diesel(Daimler), Volvo and PACCAR test 10W-30 extensively in their current engine platform and that a I6 does have the advantages of bigger rod/crank bearings compared to a pickup-spec V8?

But then again, won't the geartrain in a diesel engine driving the HPFP, oil pump and accessory drives also shear the oil down quicker as well?

Re: AC/Delco light duty diesel oil 0w-20 [Re: Rat407] #4799082 06/27/18 05:10 PM
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maxdustington Offline
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Originally Posted By: Rat407
Originally Posted By: racin4ds
You'd have to be a moron to put that water in any diesel engine! I'm sorry but if this isn't CAFE driven I don't know what is...

Go ahead, I'll bet a paycheck engines begin failing left and right and the switch to a 5W40 comes very shortly from GM.


The same moron that purchase it new and follows GM's recommendation to keep it in warranty. Like I stated above it is a completely new design straight six diesel and being built in Michigan from my understanding. No other information is being released. So no torque or HP specs or even fuel economy but GM is stating that we will not be disappointed and it will be better than the Ram and Ford 1500 diesel.


I'd be buying the specified oil for the receipts if I purchased $40000 USD truck that I intended to keep. Just because it is a new engine does not mean it was designed with 0W20 in mind. What other diesel engines do you know of that spec an xW20? I'm not a tribologist or engineer, just a BITOGer who likes it thicc.


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