GM 2.4 D.I.

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What brand of oil would be best for a 2012 GM 2.4 D.I. engine to keep deposits down on intake valves? I only use Top Tier fuels. Wife's Equinox, mainly short trips. Using Mobil1 5W30 now.
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M1 is a great oil. Either that or PP will be good for you. Stick with the OLM (which I believe was revised for the DI engine's abuse of oil) and you should have many years of use!
 
Originally Posted By: tiger862
http://www.pennzoil.com/motor-oil/pennzoil-synthetic-blend-dexos1/

This is what is recommended by GM. I would only do 3k on a Direct Injected engine. If you want to run OLM then PP or the Mobil 1 5w30 would work. I would be scared to run OLM if I planned to keep car. I have a VUE with the 2.2L Ecotech not DI and I change oil every 6 months since I am 90% stop and go and I only drive 6k or less per year.


Incorrect. GM only recommends DEXOS 1 oil. Not a specific brand.

If you want the oil that has held up the best with fuel dilution from DI, Valvoline is the answer. Maxlife would be a great choice as it meets dexos and has a strong additive package.
 
I'm no tribologist, so take this with a grain of salt. I worry about selecting an oil strictly based upon the UOA results. An oil may look OK as far as UOA goes, but it may be causing deposits to build due to high volatility. Is this even a real issue? I dunno, others can speak to it.

For my DI, I selected an oil with a low NOACK (Amsoil, although I see PU has lower...). It also had a decent UOA when I did one, and will be doing another soon. The big questions is -- how are the deposits? And only time will tell. Or tearing into the engine or scoping it, but since I'm not doing either one of those yet, we'll go with time
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IDk if volatility is an issue. The volatiles are likely the ADDS carrier; If re-sampled after initial package dispersement the volatility could be below 7%. Amsoil and PU have low initial "synthetic" NOACK values. Probably helps not to "lug" the engine or let it get detuned due to carbon buildup through sloth-like driving. Once an engine is detuned (by ecu) intake gases tend to reverse-flow more than is typical of a healthy flogged engine and this would add to any valve deposit woes.
 
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I can't prove which oil is best for you.
In this case, the factories know about DI problems, and their recommendations are likely very good.
And finally, jut hope you are lucky. Some DI systems are better than others!
 
GM's DI engines seem not to have deposit issues. Whether that's due to better oil or better engineering is a good question. To help on the oil side, I'd run something like Pennzoil Ultra or another low-NOACK oil to help with the volatility.
 
There is no data anywhere to suggest that there is more reversion in a so called "de-tuned" engine than in a "run hard" one.

Intake reversion by deliberate manipulation of VVT is quite possibly GOOD for valve deposits!
 
Originally Posted By: volk06
Originally Posted By: tiger862
http://www.pennzoil.com/motor-oil/pennzoil-synthetic-blend-dexos1/

This is what is recommended by GM. I would only do 3k on a Direct Injected engine. If you want to run OLM then PP or the Mobil 1 5w30 would work. I would be scared to run OLM if I planned to keep car. I have a VUE with the 2.2L Ecotech not DI and I change oil every 6 months since I am 90% stop and go and I only drive 6k or less per year.


Incorrect. GM only recommends DEXOS 1 oil. Not a specific brand.

If you want the oil that has held up the best with fuel dilution from DI, Valvoline is the answer. Maxlife would be a great choice as it meets dexos and has a strong additive package.


No you are incorrect. GM recommends Dexos 1 oil and it has a list of them which they recommend and Pennzoil is on the list. Valvoline is not on that list and unless things have changed Valvoline won't sign on to GM specs but they claim to exceed the spec which if GM wants to fight an engine claim they might just be able to do it since they claim without this spec damage to engine would not be covered under warranty.

http://www.gmdexos.com/
 
Originally Posted By: sciphi
GM's DI engines seem not to have deposit issues. Whether that's due to better oil or better engineering is a good question. To help on the oil side, I'd run something like Pennzoil Ultra or another low-NOACK oil to help with the volatility.


Not true. They are just as bad as the euros.

GM DI issues

To the OP, your oil choice won't make a difference. Go with whatever makes you feel best.
 
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Thanks for replies. I'm more concerned about valve deposits with the short trips she does. I have no problem changing oil every 6 months no matter what the mileage is, as this is most probably last car for the wife. Her words, not mine.
I've read here many times that PU has the lowest NOACK. True?
Just trying to put best stuff in it for how its being used.
 
Originally Posted By: tiger862
Originally Posted By: volk06
Originally Posted By: tiger862
http://www.pennzoil.com/motor-oil/pennzoil-synthetic-blend-dexos1/

This is what is recommended by GM. I would only do 3k on a Direct Injected engine. If you want to run OLM then PP or the Mobil 1 5w30 would work. I would be scared to run OLM if I planned to keep car. I have a VUE with the 2.2L Ecotech not DI and I change oil every 6 months since I am 90% stop and go and I only drive 6k or less per year.


Incorrect. GM only recommends DEXOS 1 oil. Not a specific brand.

If you want the oil that has held up the best with fuel dilution from DI, Valvoline is the answer. Maxlife would be a great choice as it meets dexos and has a strong additive package.


No you are incorrect. GM recommends Dexos 1 oil and it has a list of them which they recommend and Pennzoil is on the list. Valvoline is not on that list and unless things have changed Valvoline won't sign on to GM specs but they claim to exceed the spec which if GM wants to fight an engine claim they might just be able to do it since they claim without this spec damage to engine would not be covered under warranty.

http://www.gmdexos.com/


My statement was saying that GM does not recommend one particular brand, which is how your post made it seem. That GM had recommended Pennzoil synblend, while it is approved, its not GM saying it recommends the pennzoil. Pennzoil is recommending it for GM vehicles because it meets the spec.

Also, you DO NOT have to use a DEXOS 1 oil. It states you can use an oil of EQUIVALENT quality to DEXOS 1. It would be very hard for them to deny a claim due to using an oil that exceeds DEXOS1 but is not certified due to that clause in the OMs.
 
PQIA did a nice test of synthetics (SN) and yes, PU had a lower NOACK than even Amsoil's ASL.
 
http://www.valvoline.com/promos/dexos.jsp

You can use an equivalent oil if you want but why would you. I posted Valvoline answer to Dexos 1 and all though out answer is most likely will meet or exceed. You see they don't have specs to Dexos 1 (they would not pay for it)but they claim to know how it works and there oil will do the same. Also they stated don't use Dexos 1 in other manufactures since most likely doesn't meet the emission system or E85 requirements. Again your choice. The original question is what would we use and again I will state Pennzoil Synthetic Blend Dexos 1 as my choice as it is Dexos 1 certified.
 
Originally Posted By: tiger862
http://www.valvoline.com/promos/dexos.jsp

You can use an equivalent oil if you want but why would you. I posted Valvoline answer to Dexos 1 and all though out answer is most likely will meet or exceed. You see they don't have specs to Dexos 1 (they would not pay for it)but they claim to know how it works and there oil will do the same. Also they stated don't use Dexos 1 in other manufactures since most likely doesn't meet the emission system or E85 requirements. Again your choice. The original question is what would we use and again I will state Pennzoil Synthetic Blend Dexos 1 as my choice as it is Dexos 1 certified.


You see, just because they don't pay for the licensing fee does not mean they can't test for it. The specs aren't that hard to get a hold of. Ashland/Vavloline is one of the few companies that can actually do their tests as they have the testing facilities.
This statement" Also they stated don't use Dexos 1 in other manufactures since most likely doesn't meet the emission system or E85 requirements." does not make any sense. This is your interpretation and not the actual meaning. This is the actual wording, "The dexosTM1 specification provides for greater control of deposits, more restrictive volatility requirements and introduces an aeration requirement. Interestingly it lacks the emissions system protection and E-85 compatibility requirements of the ILSAC and API specifications." So your saying you cant use PP, QSUD, M1, M1 EP, Maxlife, Pennzoil synblned in other vehicles? Yea right.... Especially since all DEXOS 1 oils are SN rated/Resource conserving... If you find one please be sure to let me know.

Also, you can use which ever you would like. I am just pointing out the facts.
 
Originally Posted By: volk06


Also, you DO NOT have to use a DEXOS 1 oil. It states you can use an oil of EQUIVALENT quality to DEXOS 1. It would be very hard for them to deny a claim due to using an oil that exceeds DEXOS1 but is not certified due to that clause in the OMs.


Due to that clause, yes. Otherwise, many OEM's REQUIRE compliance with a given spec/approval. Ford requires a lube with one of their WSS spec's for most (all?) applications, though nobody appears to read their owners manual to know that one....
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Again you are reading what you want to prove you are right. What is stated was not to use a Dexos 1 only oil in lets see a Ford. Now if you looks at Pennzoil Dexos it only meets Dexos SN and GF5 wear as PP meets other specs but not Dexos. You are looking at old data. QSUD does show all specs as well as Dexos. Again your choice.

http://www.quakerstate.com/#/motor-oil/ultimate-durability
http://www.pennzoil.com/motor-oil/pennzoil-platinum-full-synthetic-motor-oil/#Specifications
http://www.pennzoil.com/motor-oil/pennzoil-synthetic-blend-dexos1/#Specifications
 
Originally Posted By: tiger862
Again you are reading what you want to prove you are right. What is stated was not to use a Dexos 1 only oil in lets see a Ford. Now if you looks at Pennzoil Dexos it only meets Dexos SN and GF5 wear as PP meets other specs but not Dexos. You are looking at old data. QSUD does show all specs as well as Dexos. Again your choice.

http://www.quakerstate.com/#/motor-oil/ultimate-durability
http://www.pennzoil.com/motor-oil/pennzoil-platinum-full-synthetic-motor-oil/#Specifications
http://www.pennzoil.com/motor-oil/pennzoil-synthetic-blend-dexos1/#Specifications


Wrong again. I simply copied and pasted straight from your link. Anyway, Pennzoil Platinum is certifed. You're looking at old data and pennzoil's website is laughable at best. They don't even have the recent PDSs of their oils, you have to go to Shell's database to obtain it. Here's the GM list as of March 4, 2013.

http://www.gmdexos.com/licensedbrands/dexos1licensedbrands.html

Also, if you actually read the PDS, you will see pennzoil gold meets all of, lets say, Ford's Specs. This is the most recent PDS they have available.

http://www.epc.shell.com/Docs/GPCDOC_X_cbe_24855_key_140007054920_201202271127.pdf

If you don't believe me, with the proof given, go look at a new quart of the pennzoil gold or PP.

Your choice now.
 
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