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#4606632 - 12/17/17 07:59 PM School me on what Dexos really is
Durango Offline


Registered: 02/15/07
Posts: 2081
Loc: Los Angeles, California
Hello to all,

I haven't been on this forum for some time and need some old time schooling.
I just had an oil change done on my 2013 Camaro and wanted Mobil 1. When I got it back home I noticed they use Dexos brand of oil.
Are or Is Dexos the same as M1?

Durango

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#4606637 - 12/17/17 08:03 PM Re: School me on what Dexos really is [Re: Durango]
Gilstein Offline


Registered: 06/14/10
Posts: 138
Loc: Southeast
Dexos is a spec, gm spec, not a brand of oil
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#4606638 - 12/17/17 08:06 PM Re: School me on what Dexos really is [Re: Durango]
Carbon12 Offline


Registered: 03/10/15
Posts: 199
Loc: MO
It is GM's oil specification. Just like Dexron for transmissions and Dexcool for coolant. I don't think I have ever seen a set of exact specs, but it is supposed to be better than basic API SN/ ILSAC GF-5. Several major name brands and even several house brands are Dexos.

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#4606640 - 12/17/17 08:08 PM Re: School me on what Dexos really is [Re: Durango]
TmanP Offline


Registered: 10/30/15
Posts: 436
Loc: MN
Dexos is a spec for oils that GM created. I believe that it came around in 2011 or 2012. It has minimum standards for various aspects of the oil's performance (i.e. shear stability, deposit formation, etc.)
Most off-the-shelf synthetic oils (PP, M1, VSP etc) meet Dexos, as well as Supertech and other store brands.
Synthetic blends can also meet Dexos, though they are generally robust blends with a high percentage of synthetic in them.

"Synthetic blends" that are really just conventional with a splash of synthetic to meet SN (i.e. many conventionals- VWB, Chevron Supreme, etc.) do not meet Dexos. Some of the higher-percentage blends do though. But your PYB, Formula Shell, Havoline, QSGB, VWB, etc. do not meet the specs.
(There is now Dexos Gen 2, a revised spec that is more exclusive and harder to pass. It rolled out recently.)
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#4606673 - 12/17/17 08:48 PM Re: School me on what Dexos really is [Re: TmanP]
bbhero Offline


Registered: 03/20/15
Posts: 4634
Loc: Virginia
Very good post TmanP.

Durango if your service was at a GM dealership I would think you got Conoco Phillips Dexos approved oil. Though it also could have been the older GM Dexos oil provider of Exxon Mobil I think. Either would be very good for your Camaro.
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#4606688 - 12/17/17 09:01 PM Re: School me on what Dexos really is [Re: Durango]
The Critic Offline


Registered: 08/30/04
Posts: 19810
Loc: CA
The ACDelco Dexos1 gen2 approved oil is full synthetic.
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2011 Toyota Prius - 168k - ServicePro Dexos 0W-20
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#4606693 - 12/17/17 09:04 PM Re: School me on what Dexos really is [Re: Durango]
AZjeff Offline


Registered: 01/14/11
Posts: 2656
Loc: PV Az
So nobody knows what the Dexos specs are?
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#4606695 - 12/17/17 09:05 PM Re: School me on what Dexos really is [Re: AZjeff]
The Critic Offline


Registered: 08/30/04
Posts: 19810
Loc: CA
Originally Posted By: AZjeff
So nobody knows what the Dexos specs are?


The info should be on the internet somewhere. The spec is not a proprietary one; you can submit for licensing.
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2011 Toyota Prius - 168k - ServicePro Dexos 0W-20
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#4606696 - 12/17/17 09:05 PM Re: School me on what Dexos really is [Re: Durango]
dogememe Offline


Registered: 04/15/17
Posts: 614
Loc: SF BAY AREA, CA
Dexos1 Gen1 was a licensing program that certifies that oil is of good quality - most synthetics and many blends meet this requirement. Now, Dexos1 Gen2 is a little stricter and was specifically designed to combat LSPI (low-speed pre-ignition) which is important For small displacement turbo-charged direct injection engines...
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#4606700 - 12/17/17 09:07 PM Re: School me on what Dexos really is [Re: Durango]
69Torino Offline


Registered: 12/12/17
Posts: 242
Loc: Indy
Originally Posted By: Durango
School me on what Dexos really is


Grounds to deny warranty coverage.


Sorry couldn't resist. Carry on.
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Apparently I own too many cars and toys to fit in a signature.

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#4606710 - 12/17/17 09:18 PM Re: School me on what Dexos really is [Re: Durango]
Warstud Offline


Registered: 09/02/05
Posts: 5414
Loc: MIchigan
GM Dexos Motor Oil Specifications

GM Dexos approved oils are recommended to be used in all GM vehicles except those built with Duramax diesel engines that require an API CJ-4 quality oil.

GM Dexos 1
Designed with gasoline engines in mind GM Dexos 1 replaces the GM-LL-A-025, GM6094M and GM4718M specifications. This specification is usually recommended for GM vehicles built for the North American and Asian markets. Compared to ILSAC GF-5 it has stricter requirements regarding piston deposit formation, aeration, oxidation stability, wear, low-temperature pumpability and volatility.
GM Dexos 2
The GM Dexos 2 specification is meant to be the replacement for both GM-LL-A-025 (gasoline) and GM-LL-B-025 (diesel) specifications for the European market. Oils meeting GM Dexos 2 are required for vehicles manufactured from MY2011 onward but they are also backward compatible with older models. This specification is built on the ACEA C3 standard but also contains elements from the ILSAC GF-4 deposit formation test and low-temperature sludge build-up test.

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#4606723 - 12/17/17 09:29 PM Re: School me on what Dexos really is [Re: Durango]
AZjeff Offline


Registered: 01/14/11
Posts: 2656
Loc: PV Az
Thanks Warstud. Pretty generic. Is it possible to find the details for the other GM oil specs listed or are they all top secret? Tried searching and didn't see any solid numerical specifications. Just curious.
_________________________
86 Samurai 1.3 leftovers
14 RAV4 2.5 5W-20 PP *gasp*
16 Silverado 1500 4.3 Ecotec3, DI, AFM 5W-30 PP

Why know when you can guess?!


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#4606740 - 12/17/17 09:57 PM Re: School me on what Dexos really is [Re: Warstud]
bbhero Offline


Registered: 03/20/15
Posts: 4634
Loc: Virginia
Good job Warstud.

AZJeff I know that the NOACK volatility needs to be less than 13% for Dexos approval. Versus API SN of 15%. The latest configuration of Dexos approval is about LSPI, timing chain wear standard as well.

I saw the specific numbers somewhere but I forget where I saw them.... Will try to see if I can find them.


Edited by bbhero (12/17/17 09:59 PM)
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"Treat your family like your friends and treat your friends like your family."

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#4606840 - 12/18/17 12:10 AM Re: School me on what Dexos really is [Re: Warstud]
zeng Offline


Registered: 09/01/15
Posts: 2189
Loc: Malaysia
Originally Posted By: Warstud
GM Dexos 2
The GM Dexos 2 specification is meant to be the replacement for both GM-LL-A-025 (gasoline) and GM-LL-B-025 (diesel) specifications for the European market. Oils meeting GM Dexos 2 are required for vehicles manufactured from MY2011 onward but they are also backward compatible with older models. This specification is built on the ACEA C3 standard but also contains elements from the ILSAC GF-4 deposit formation test and low-temperature sludge build-up test.

Would a Dexos 2 relatively surpassed an ACEA C3 in:
a)Higher percentage good base oils;
b)Higher base oil quality ;
c)Higher amount and higher quality additives ?
TIA

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#4606842 - 12/18/17 12:16 AM Re: School me on what Dexos really is [Re: AZjeff]
kohnen Offline


Registered: 01/24/09
Posts: 365
Loc: So. Cal.
Originally Posted By: AZjeff
So nobody knows what the Dexos specs are?


http://www.hankgraffbgc.com/Dexos1.pdf
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