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Anyone know what the SAE/API ratings are for dexos D, 0W-20? #5264051 11/11/19 10:05 AM
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wensteph Offline OP
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Only two approved oils, ACDelco and Mobil (same oil as XOM is the supplier for ACDelco) but nothing on websites gives any information.

Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: wensteph] #5264093 11/11/19 10:52 AM
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bullwinkle Offline
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What vehicle is it for? Could it be FA-4?


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: wensteph] #5264132 11/11/19 11:42 AM
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wensteph Offline OP
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The 2020 GM 1500 3.0L Duramax.

Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: wensteph] #5264327 11/11/19 03:17 PM
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paoester Offline
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Actually "dexosD 0w20" says it all. You don't need to know anything else.
I prefer Mobil1 ESP x2 0w20 because it is not only dexosD, but it also has a long list of other accomplishments. It has passed VW 508 (for my '19 Tiguan), Mercedes 229.71, Porsche C20, Jaguar-LandRover, SN, C5.
All you care about is seeing the dexosD part.
https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-esp

Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: wensteph] #5264355 11/11/19 04:03 PM
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bullwinkle Offline
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New one on me, I always thought Dexos 2 was the GM diesel oil spec. Reminds me why all my stuff is old...


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: wensteph] #5264377 11/11/19 04:47 PM
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paoester Offline
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dexos1 -- Gasoline engines only
dexos2 -- Most diesel engines, and a few gasoline engines (Corvette here; gasoline in Euro). Gasoline here is now low sulfur, so why not? As long as LSPI is not a concern.
dexosD -- 0w20 diesel only, very special purpose right now. I expect it will expand to gasoline and diesel engines later.

Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: paoester] #5264384 11/11/19 04:55 PM
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bullwinkle Offline
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Originally Posted by paoester
dexos1 -- Gasoline engines only
dexos2 -- Most diesel engines, and a few gasoline engines (Corvette here; gasoline in Euro). Gasoline here is now low sulfur, so why not? As long as LSPI is not a concern.
dexosD -- 0w20 diesel only, very special purpose right now. I expect it will expand to gasoline and diesel engines later.

I’m just surprised that dexosD isn’t FA-4, maybe to eliminate confusion with HD diesel oils (which seem to be -30 weights).


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Anyone know what the SAE/API ratings are for dexos D, 0W-20? [Re: wensteph] #5264414 11/11/19 05:38 PM
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paoester Offline
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bullwinkle, FA-4 has HTHS 2.9-3.2, and dexosD is around 2.6. I guess FA-4 can't go low enough.
Other differences, FA-4 is higher SAPS than dexosD.
Noticing Mobil Delvac 1™ Advanced Fuel Economy (HTHS 3.2) does have a gasoline rating, SN at least. It could be used in a lot of passenger car gasoline engines.

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