New Oil Viscosity Recommended

[Byrds8]

Can you please share the GM Published list of approved oils?

@Koppster listed it in his post above. I reposted it below.

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[bobo57]

@Koppster listed it in his post above. I reposted it below.

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Thanks, interesting I don't see a 0W-20.

 

[geddyflea]

In regards to Pennzoil, their Ultra Platinum has been certified by GM. Here is a screenshot of an email I received from Shell USA

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[MNNJR69]

Sorry @Byrds8 . That's incorrect information.
It is approved by GM.
They would have to prove it was the oil changes every 2500-3 K that blew the engine. I've got every receipt for everything I've ever done to my truck. I do my best to always use products that exceed GM's quality expectations!

 

[Byrds8]

Sorry @Byrds8 . That's incorrect information.
It is approved by GM.
They would have to prove it was the oil changes every 2500-3 K that blew the engine. I've got every receipt for everything I've ever done to my truck. I do my best to always use products that exceed GM's quality expectations!

You would definitely have to show me how that info is incorrect when it comes from the GM Dexos website. Regardless of an email from Pennzoil stating "its coming" doesnt mean its there yet.

 

[bobo57]

You would definitely have to show me how that info is incorrect when it comes from the GM Dexos website. Regardless of an email from Pennzoil stating "its coming" doesnt mean its there yet.

 

[AXE]

I think running any quality 0W40 oil is gonna be just fine. DEXOS doesn't likely mean better protection, it's simply a formula that GM approved and licensed for use. I've always used it, primarily cause I use Mobil 1 oil. But I wouldn't be sweating running other quality name brands.

 

[Byrds8]

I think running any quality 0W40 oil is gonna be just fine. DEXOS doesn't likely mean better protection, it's simply a formula that GM approved and licensed for use. I've always used it, primarily cause I use Mobil 1 oil. But I wouldn't be sweating running other quality name brands.

Agree 100%. I’m sure there are better oils than than some of the DEXOS certified ones. I only answered the direct question of it that specific oil was on the list. I used PUP all the time in prior vehicles but it was more readily available then too.

 

[AXE]

Agree 100%. I’m sure there are better oils than than some of the DEXOS certified ones. I only answered the direct question of it that specific oil was on the list. I used PUP all the time in prior vehicles but it was more readily available then too.

That's partly why I use Mobil 1 cause its usually easy to get. However, I had a hard time finding their ATF and gear oil locally this past week, so I'm about to drop in some Valvoline.

 

[MNNJR69]

SO.......1st and foremost I need to speak up and own my mistake. Yes Pennzoil ultimate Platinum 0W-40 is Dexos approved, BUT not the specific formula I have currently.
My apologies @Byrds8.



So after some specific research in which most of my info came from the Lake the motor oil geek.

The difference between the the SRT formula Pennzoil ultra platinum 0 w 40 and the mobil 1 brands...(3 different formulas) Is that the SRT formula has specific detergents and ani wear agents containing specific metals that are designed to work the best with high performance SRT engines... Hellcat, hemi, ect.
It has to do with the type of metals they use as a base for the detergent and the anti-wear agent and if it is compatible with the type of metals that the engine metals are made from. Specific example is the SRT formula has a higher boron value as part of its anti wear additive package, but the base oil use by Pennzoil is not. It exceeds most other brands of oil, but I did not know about the specifics of the detergent and anti wear packages and how they are mixed with the base oil, specifically, the types of metals used in their detergent and anti-ware packages between the formulas. Next change I'm going to try the Pennzoil ultimate Platinum 0W-40 with the dexos seal and license number.
I'm not going to run out and change my oil after 500 mi because the chemical makeup of a detergent package. I feel extremely confident that this oil is not going to damage the engine, rather science shows the exact opposite.
I will do more research to see if there is any adverse effects from the SRT formula compared to Mobil 1 formulas and post my findings.

Regardless of the specific formula, Pennzoil ultra platinum base formula is a superior oil to most brands because of the way it is processed. It is the only oil that is made from gas and it is the only brand that uses a higher concentration of pure synthetic oil in the mix. Other brands use more regularly processed oil and add less synthetic in the mix. When a company advertises fully synthetic.....it is not truly full synthetic, rather a blend between a large base of regular oil and a small amount of synthetic oil. Pennzoil ultra platinum base oil is superior and the combination of a higher amount of detergents and anti wear additives from most other brands, makes it what it is.

 

[KLA]

Excellent write up. Gotta love these oil threads. Sometimes they get pretty intense. LOL