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#4642543 - 01/22/18 06:26 AM DEXOS1 Gen 2 : Best For GDI Of All Makes ?
ChrisD46 Offline


Registered: 09/10/10
Posts: 1897
Loc: GA.
While DEXOS1 Gen2 is a GM oil spec - what are your thoughts that DEXOS1 Gen 2 would be the best US oil for all makes of GDI engines which use 0W20/30 or 5W20/30 ?
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#4642548 - 01/22/18 06:33 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: ChrisD46]
Trav Offline


Registered: 11/20/06
Posts: 18861
Loc: MA, Mittelfranken.de
I prefer an A3/B4 oil, Mobil 1 0w40 would be fine where you are.
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#4642557 - 01/22/18 06:45 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: Trav]
rooflessVW Offline


Registered: 12/24/11
Posts: 4040
Loc: North Carolina
Originally Posted By: Trav
I prefer an A3/B4 oil, Mobil 1 0w40 would be fine where you are.

+1
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#4642569 - 01/22/18 07:10 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: ChrisD46]
wemay Offline


Registered: 04/04/12
Posts: 8864
Loc: Southeast Florida
All GDi Turbo.
It's either A3/B4 or d1G2 for me.
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#4642570 - 01/22/18 07:11 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: ChrisD46]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1709
Loc: Alberta
Originally Posted By: ChrisD46
While DEXOS1 Gen2 is a GM oil spec - what are your thoughts that DEXOS1 Gen 2 would be the best US oil for all makes of GDI engines which use 0W20/30 or 5W20/30 ?


Sorry but I'm not a high vis guy. Yes, I now use Dexos on my Ford as well as my Chev. I believe Dexos truly is a cut above.

I also made a table for the high vis guys.

If the manufacturer says 30 weight, use 40
If the manufacturer says 20 weight, use 30

Hope that helps. SF



Edited by Snagglefoot (01/22/18 07:11 AM)

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#4642593 - 01/22/18 07:56 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: Snagglefoot]
Nyquist Offline


Registered: 10/24/08
Posts: 967
Loc: Iowa
I generally stick with the specified viscosity. That being said, dexos1 Gen2 has some added tests that aren't in API SN or ILSAC GF5 tests that also include a timing chain wear test if I recall. I trust dexos1 Gen2 enough that I drained the oil out on our Cruze very early just to get the new stuff in the engine.
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#4642595 - 01/22/18 07:57 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: ChrisD46]
oil_film_movies Online   content


Registered: 06/13/16
Posts: 2554
Loc: MN
New GM ad campaign: "dexos1 Gen2: Not Just for Breakfast Anymore"

dexos1 tests are run after all the usual SN, GF-5 tests have been run, so you can already see its a 'generic' spec.
Then, dexos1-unique tests pull some ACEA tests in (European), so you can see its also a Euro spec to some degree, using Euro engines for tests.
After that, other tests are run which further validate the oil for more types of seals, LSPI in GM engines, chain wear, oxidation tests, .... but its all applicable to any non-GM engine.
For all American, Japanese, British, & Korean makes anyway. Germans do their own thing, although the full-syn versions of dexos1 Gen2 would probably work fine in BMW's too since BMW went HTHS<3.0 recently in almost all their engines. BMW, VW, and Mercedes have their own specs, and should be followed though.

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#4642783 - 01/22/18 10:59 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: ChrisD46]
pbm Offline


Registered: 04/19/04
Posts: 7599
Loc: New York
I believe that the original 'dexos' spec'd oil would work fine in a non-turbo GDI engine.
A small (1.4L, 1.5L, 1.6L etc....) turbo GDI probably benefits from gen2 dexos oil.....unfortunately these engines seem to be the 'future'....
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#4642806 - 01/22/18 11:11 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: pbm]
csandste Offline


Registered: 05/31/02
Posts: 1178
Loc: St. Peters, Missouri
Originally Posted By: pbm
I believe that the original 'dexos' spec'd oil would work fine in a non-turbo GDI engine.
A small (1.4L, 1.5L, 1.6L etc....) turbo GDI probably benefits from gen2 dexos oil.....unfortunately these engines seem to be the 'future'....


Or a turbo without GDI. If it had both, then I would go for Dexos 1 gen 2.
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#4642830 - 01/22/18 11:29 AM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: ChrisD46]
KCJeep Offline


Registered: 06/30/11
Posts: 6996
Loc: Mahzurrah!
Do all Dexos 1 Gen 2 oils have low calcium? Or do they have low calcium at all?
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#4642887 - 01/22/18 12:37 PM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: KCJeep]
oil_film_movies Online   content


Registered: 06/13/16
Posts: 2554
Loc: MN
Originally Posted By: KCJeep
Do all Dexos 1 Gen 2 oils have low calcium?
QSUD, PP, Canadian AC-Delco, U.S. AC-Delco, and all dexos1 M1 oils do have Ca<1200ppm or so. (In the past, Ca ranged from maybe 1800 to 2800 ppm. Except for dexos1 M1 which has been low-Ca for 4 years now.)

Na+Ca is supposed to be really bad for LSPI, so I'm wondering if the old Valvoline Synthetic Na+Ca formula will survive to be dexos1 Gen2. Waiting for an oil analysis to be posted here.

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#4642902 - 01/22/18 12:46 PM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: oil_film_movies]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
I wouldn’t run it in my BMW
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#4642934 - 01/22/18 01:13 PM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: Bryanccfshr]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1709
Loc: Alberta
Originally Posted By: Bryanccfshr
I wouldn’t run it in my BMW


And far enough. The Europeans sure seem to like 40 weight oil. Not sure why the divergence.

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#4642949 - 01/22/18 01:26 PM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: Snagglefoot]
kschachn Offline


Registered: 12/26/05
Posts: 9390
Loc: Upper Midwest
Originally Posted By: Snagglefoot
The Europeans sure seem to like 40 weight oil. Not sure why the divergence.

They like a minimum HTHS.

Or at least they used to.
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#4642981 - 01/22/18 01:42 PM Re: DEXOS1 Gen 2 : Best For GDI Of All Makes ? [Re: kschachn]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
I am not familiar on if gm goes to the extent of designing and installing Crankcase turbo blow by baffles into their blocks.
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2018 Trd Pro 4Runner M1 0w40
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