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School me on what Dexos really is #4606632
12/17/17 08:59 PM
12/17/17 08:59 PM
Joined: Feb 2007
Posts: 2,081
Los Angeles, California
Durango Offline OP
Durango  Offline OP
Joined: Feb 2007
Posts: 2,081
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

Re: School me on what Dexos really is [Re: Durango] #4606637
12/17/17 09:03 PM
12/17/17 09:03 PM
Joined: Jun 2010
Posts: 140
Southeast
Gilstein Offline
Gilstein  Offline
Joined: Jun 2010
Posts: 140
Southeast
Dexos is a spec, gm spec, not a brand of oil



Re: School me on what Dexos really is [Re: Durango] #4606638
12/17/17 09:06 PM
12/17/17 09:06 PM
Joined: Mar 2015
Posts: 206
MO
Carbon12 Offline
Carbon12  Offline
Joined: Mar 2015
Posts: 206
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.

Re: School me on what Dexos really is [Re: Durango] #4606640
12/17/17 09:08 PM
12/17/17 09:08 PM
Joined: Oct 2015
Posts: 440
MN
TmanP Offline
TmanP  Offline
Joined: Oct 2015
Posts: 440
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.)


2012 Toyota Camry 2.5 30,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 30,000 mi
2010 Toyota Sienna 3.5 V6 150,000 mi
Re: School me on what Dexos really is [Re: TmanP] #4606673
12/17/17 09:48 PM
12/17/17 09:48 PM
Joined: Mar 2015
Posts: 5,040
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,040
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.


Nissan Altima 3.5 Coupe
Quaker State High Mileage 5w30 Purolator Boss 14610
"Treat your family like your friends and treat your friends like your family."
Re: School me on what Dexos really is [Re: Durango] #4606688
12/17/17 10:01 PM
12/17/17 10:01 PM
Joined: Aug 2004
Posts: 19,990
CA
The Critic Offline
The Critic  Offline
Joined: Aug 2004
Posts: 19,990
CA
The ACDelco Dexos1 gen2 approved oil is full synthetic.


2011 Toyota Prius - 173k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 131K - Mobil 1 EP HM 5W-30
Re: School me on what Dexos really is [Re: Durango] #4606693
12/17/17 10:04 PM
12/17/17 10:04 PM
Joined: Jan 2011
Posts: 2,944
PV Az
AZjeff Offline
AZjeff  Offline
Joined: Jan 2011
Posts: 2,944
PV Az
So nobody knows what the Dexos specs are?


86 Samurai 1.3 leftovers
14 RAV4 2.5 5W-20 PP
16 Silverado 1500 4.3, DI, AFM 5W-30 PP

The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: School me on what Dexos really is [Re: AZjeff] #4606695
12/17/17 10:05 PM
12/17/17 10:05 PM
Joined: Aug 2004
Posts: 19,990
CA
The Critic Offline
The Critic  Offline
Joined: Aug 2004
Posts: 19,990
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.


2011 Toyota Prius - 173k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 131K - Mobil 1 EP HM 5W-30
Re: School me on what Dexos really is [Re: Durango] #4606696
12/17/17 10:05 PM
12/17/17 10:05 PM
Joined: Apr 2017
Posts: 976
SF BAY AREA, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 976
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...


2007 Crown Vic P71 4.6 ~127K Miles, RP HPS 5W-30, RP 20-820.
2010 Escape FWD 2.5 ~90K Miles, Castrol Edge EP 5W-30, Wix 51348.
Re: School me on what Dexos really is [Re: Durango] #4606700
12/17/17 10:07 PM
12/17/17 10:07 PM
Joined: Dec 2017
Posts: 348
Indy
69Torino Offline
69Torino  Offline
Joined: Dec 2017
Posts: 348
Indy
Originally Posted By: Durango
School me on what Dexos really is


Grounds to deny warranty coverage.


Sorry couldn't resist. Carry on.


1969 Ford Torino GT 390 Auto
2003 Mercury Marauder
1992 Mercury Capri Convertible
2005 Ford Freestyle
2008 Hyundai Santa Fe
2015 Kia Optima
1947 Ford 2N
1978 Honda XL75
Plus Other Stuff...
Re: School me on what Dexos really is [Re: Durango] #4606710
12/17/17 10:18 PM
12/17/17 10:18 PM
Joined: Sep 2005
Posts: 5,684
MIchigan
Warstud Online content
Warstud  Online Content
Joined: Sep 2005
Posts: 5,684
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.

Re: School me on what Dexos really is [Re: Durango] #4606723
12/17/17 10:29 PM
12/17/17 10:29 PM
Joined: Jan 2011
Posts: 2,944
PV Az
AZjeff Offline
AZjeff  Offline
Joined: Jan 2011
Posts: 2,944
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
16 Silverado 1500 4.3, DI, AFM 5W-30 PP

The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: School me on what Dexos really is [Re: Warstud] #4606740
12/17/17 10:57 PM
12/17/17 10:57 PM
Joined: Mar 2015
Posts: 5,040
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,040
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.

Last edited by bbhero; 12/17/17 10:59 PM.

Nissan Altima 3.5 Coupe
Quaker State High Mileage 5w30 Purolator Boss 14610
"Treat your family like your friends and treat your friends like your family."
Re: School me on what Dexos really is [Re: Warstud] #4606840
12/18/17 01:10 AM
12/18/17 01:10 AM
Joined: Sep 2015
Posts: 2,261
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,261
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

Re: School me on what Dexos really is [Re: AZjeff] #4606842
12/18/17 01:16 AM
12/18/17 01:16 AM
Joined: Jan 2009
Posts: 365
So. Cal.
kohnen Offline
kohnen  Offline
Joined: Jan 2009
Posts: 365
So. Cal.
Originally Posted By: AZjeff
So nobody knows what the Dexos specs are?


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


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