New lubricant standard for Stellantis FPW9.55535/03

[DC11]

Any toughts on subject "Stellantis group goes from 0w30 to 5w30 in order to prevent chain wear"? First time I've seen impact of low W viscosity on chain wear.
"In December 2023, the dealers of the Citroën, DS, Opel and In December 2023, the dealers of the Citroën, DS, Opel and Peugeot have received a technical note indicating : « Research work and mechanical tests carried out have shown that the use of a specific engine oil had a positive impact on the reliability of DV5R engines in service produced before February 2023. » Thus, the Stellantis group recommends the use of a 5W30 lubricant instead of 0W30. The difference ? The viscosity is higher when cold start. « This new standard Stellantis FPW9.55535/03 aims to reduce’wear and preserve the service life of mechanical components », is it specified. Source: https://www.largus.fr/actualite-aut...iter-la-casse-30031534.html?at_medium=custom3

 

[JavierH19]

Probably has 0.1-0.3 hths more and preventing a bit more of it from shearing as well.

 

[Cujet]

No surprise here. The closer we get to a true 30 viscosity oil, the longer chains last. We've known this forever. 10W-30 is likely to be even better.

 

[JustN89]

There was a Nissan technical paper floating around that showed the relation between timing chain wear and the Winter rating of oil. I don’t have it readily available, but @Cujet succinctly sums it up the findings.

 

[The Critic]

Stellantis seems to be making some bold oil recommendations lately:

Stellantis 6.7L Cummins TSB: Only use 10W30 on 2019MY+, 15W40 can cause damage

https://static.nhtsa.gov/odi/tsbs/2020/MC-10178698-9999.pdf Was advised by a few reputable dealer techs than 15W40 was causing the pushrod and rocker arm issues, and this is one of the reasons why Stellantis came out with this TSB. Any thoughts on this? Surprised to see a 15W-xx oil cause...

bobistheoilguy.com

 

[OVERKILL]

Should probably be noted that this is a diesel engine.

The previously recommended lubricants were:
PSA B71 2312 0W-30
PSA B71 2010 0W-20

These are C2 oils with an HTHS of 2.6-3.0cP

This new lubricant recommendation is for a C3 oil, which has an HTHS of 3.5cP or higher.

So, I'm not sold on the idea that it's the Winter rating in play here. I expect it's the HTHS.

 

[Foxtrot08]

Stellantis seems to be making some bold oil recommendations lately:

Stellantis 6.7L Cummins TSB: Only use 10W30 on 2019MY+, 15W40 can cause damage

https://static.nhtsa.gov/odi/tsbs/2020/MC-10178698-9999.pdf Was advised by a few reputable dealer techs than 15W40 was causing the pushrod and rocker arm issues, and this is one of the reasons why Stellantis came out with this TSB. Any thoughts on this? Surprised to see a 15W-xx oil cause...

bobistheoilguy.com

Yeah, try to convince every contractor, farmer and small trucking company to run 10w30 in their 6.7's.

Which... can be found in almost everything...

I think I've bashed my head against that wall enough.