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#4563694 - 11/04/17 09:21 AM Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles
BobsArmory Offline


Registered: 03/28/10
Posts: 1320
Loc: Michigan
UOA for my wife's 2016 Malibu with the 1.5 liter direct injection turbo . Yes I know it was a short run but I mostly wanted to drain the unknown dealer bulk oil out and put in something that I was sure had DEXOS Gen2 certifications. After prying and prodding the service writer about what oil it was he would only say that it was a Mobil product but I'm not even really sure about that. He got kind of ticked off when I was questioning him. Air filter is original factory. Air box has never been opened up.

If I can't find a leak, should I change out the air filter?
Does this look like a Mobil product?
Thoughts?

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Keeping the forces of evil at bay
2016 Chevy Malibu LT 1.5 Liter Turbo
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#4563712 - 11/04/17 09:35 AM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
CT8 Offline


Registered: 10/09/14
Posts: 11009
Loc: Idaho
The oil is thin.
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"Don't let your preconceived notions get in the way of facts."
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#4563732 - 11/04/17 09:51 AM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
Virtus_Probi Offline


Registered: 06/25/15
Posts: 3970
Loc: New England
The moly looks high and the boron low compared to M1 5W30 VOAs I've seen, but the low calcium concentration along with the presence of magnesium remind me of M1. The zinc is actually kind of high in this sample, which is good for preventing LSPI. I'd guess you might have had some fuel dilution that Blackstone didn't catch.
I believe that the oil change during the recall service for that engine was supposed to be done with ACDelco oil in the US and M1 in Canada, so I wouldn't be surprised if you had ACDelco oil and that was made by XOM. Just my speculation, though.
We have some evidence that dexos1 Gen 2 oils from other makers are going to start looking like this...
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2014 Forester XT, 80500 miles
Last Change;
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#4563739 - 11/04/17 09:57 AM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
bigj_16 Offline


Registered: 07/03/17
Posts: 1268
Loc: Douglas County, Colorado
I would change the air filter.

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#4563787 - 11/04/17 10:50 AM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
69GTX Offline


Registered: 09/23/15
Posts: 3815
Loc: Connecticut
At least through PQIA samples for 20 and 30 grade oils, almost none of them show up with magnesium except M1 synthetic. Older castrol had magnesium but at 3X these levels. And if M1, it sheared down from 11.1 to 8.55 in only 3700 miles....quite a lot. Up to only a few years ago all the Mobil conventional oils were non-magnesium.
_________________________
----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs

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#4563791 - 11/04/17 10:53 AM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
danez_yoda Offline


Registered: 07/18/09
Posts: 465
Loc: texas
26K miles on a air filter will depend on how dusty your roads are. City only driving, that last a LONG time. driving near dusty construction sites or gravel/dirts roads, check frequently.

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#4563836 - 11/04/17 11:30 AM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: bigj_16]
Linctex Offline


Registered: 12/31/16
Posts: 6160
Loc: Waco, TX
Originally Posted By: bigj_16
I would change the air filter.


NEW air filters are more porous, actually making silicon numbers increase.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4563906 - 11/04/17 12:49 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1139
Loc: Winchester, Indiana
From the viscosities, I'd say they used the 0W-20 dexos by accident... if only because BOTH viscosity checks fall exactly into line with every 0W20 UOA I've had done on my Fusion. Nature just doesn't make mistakes that pretty smile And, considering that this: "Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 Synthetic Blend is recommended. See Engine Oil 0 290." Is all the owner's manual states, well, 0W20 dexos1 IS a "proper SAE viscosity grade" for some GM engines smile

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#4563987 - 11/04/17 02:20 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
BobsArmory Offline


Registered: 03/28/10
Posts: 1320
Loc: Michigan
The last time this car was there they put on the incorrect oil filter. Now it looks like they might have put in the wrong weight oil. Good thing the free oil changes are done and I'll be doing it myself.
_________________________
Keeping the forces of evil at bay
2016 Chevy Malibu LT 1.5 Liter Turbo
2017 Chevy Equinox LT 2.4 Liter

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#4563988 - 11/04/17 02:23 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: Linctex]
BobsArmory Offline


Registered: 03/28/10
Posts: 1320
Loc: Michigan
Originally Posted By: Linctex
Originally Posted By: bigj_16
I would change the air filter.


NEW air filters are more porous, actually making silicon numbers increase.


But if the high Silicon levels are due to a defective filter wouldn't the silicon levels go down after installing a non defective filter?
_________________________
Keeping the forces of evil at bay
2016 Chevy Malibu LT 1.5 Liter Turbo
2017 Chevy Equinox LT 2.4 Liter

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#4564036 - 11/04/17 03:17 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2767
Loc: Wet side WA
Originally Posted By: BobsArmory
Originally Posted By: Linctex
Originally Posted By: bigj_16
I would change the air filter.


NEW air filters are more porous, actually making silicon numbers increase.


But if the high Silicon levels are due to a defective filter wouldn't the silicon levels go down after installing a non defective filter?



Oh LOL not until it had a million miles on it! happy
_________________________
2004 Toyota Corolla 121790
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4564069 - 11/04/17 03:51 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
Whimsey Offline


Registered: 12/22/02
Posts: 4049
Loc: The Garden State
Originally Posted By: BobsArmory

But if the high Silicon levels are due to a defective filter wouldn't the silicon levels go down after installing a non defective filter?


I don't think the filter media is defective, unless the filter is torn. More likely in a new vehicle the higher silicon levels would be a result of engine break in or a poor fitting air filter, ie defective gasket, or an intake air leak. Which is doubtful on a new vehicle unless an air intake connection from the factory is loose.

Whimsey

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#4564130 - 11/04/17 05:17 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: SubieRubyRoo]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
Originally Posted By: SubieRubyRoo
From the viscosities, I'd say they used the 0W-20 dexos by accident... if only because BOTH viscosity checks fall exactly into line with every 0W20 UOA I've had done on my Fusion. Nature just doesn't make mistakes that pretty smile And, considering that this: "Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 Synthetic Blend is recommended. See Engine Oil 0 290." Is all the owner's manual states, well, 0W20 dexos1 IS a "proper SAE viscosity grade" for some GM engines smile


With the low flash point I'd say fuel dilution is more likely the culprit here.
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P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander

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#4564202 - 11/04/17 06:31 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: 69GTX]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
Originally Posted By: 69GTX
At least through PQIA samples for 20 and 30 grade oils, almost none of them show up with magnesium except M1 synthetic. Older castrol had magnesium but at 3X these levels. And if M1, it sheared down from 11.1 to 8.55 in only 3700 miles....quite a lot. Up to only a few years ago all the Mobil conventional oils were non-magnesium.


thumbsup

This is still most likely a tight engine and the product is most likely a Mobil 1 product, but which one is impossible to tell.

The important thing is to resample down the road and see if the wear metals and silicon trend downward. Trending is the key here as one single analysis is only a snapshot in time.

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#4564232 - 11/04/17 07:14 PM Re: Dealer bulk 5w-30 3730 miles, Malibu 25,400 miles [Re: BobsArmory]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
I had high silicon the whole life of my Santa Fe's life and it was just gasket material leeching into the oil. Check for air infiltration anyway though.
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'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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