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2021 CTD oil grade

Rockwell

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Hello, I have had two previous CTD’s 13/16, has the factory recommended oil grade remained the same or has it changed with the new version of the 6.7?
 

Dwilly

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Cold weather 5w40
Hot weather 10w40.
 

Grayson

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I'm glad that bulletin was posted I had no idea it changed. Wonder if they have a disclaimer on the Valvoline jugs yet? Have they stopped recommending Power Kleen fuel additives as well?
 

Dwilly

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I'm glad that bulletin was posted I had no idea it changed. Wonder if they have a disclaimer on the Valvoline jugs yet? Have they stopped recommending Power Kleen fuel additives as well?
Yup
 

H3LZSN1P3R

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I'm glad that bulletin was posted I had no idea it changed. Wonder if they have a disclaimer on the Valvoline jugs yet? Have they stopped recommending Power Kleen fuel additives as well?
cummins has only ever approved power service additives
 

Rockwell

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I just sold my 2016 with 28k kms. The new truck with a 24k interval would equate to one oil change in 5 years!
I’ll stick to my 4K oil change regiment
 

flan

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I only do a oil change once a year due to having a VW TDI I mostly drive when not needing the truck for towing the TT, so I use 5/40 year round.
 

H3LZSN1P3R

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I just sold my 2016 with 28k kms. The new truck with a 24k interval would equate to one oil change in 5 years!
I’ll stick to my 4K oil change regiment
They do say 24,000km or 1year on the oil right in the owners manual sooooooooooooo
 

Brutal_HO

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I just sold my 2016 with 28k kms. The new truck with a 24k interval would equate to one oil change in 5 years!
I’ll stick to my 4K oil change regiment

I only put on about 5K/year so do them yearly as prescribed, in the spring just before towing season.

Project Farm did an episode on his 2nd gen(?) and a tractor that debunked the need based on oil analysis and while I value his reviews, I'm sticking to the OEM recommendation.
 

Ram911

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Can the 2021 6.7 use API-FA4?

Took this from the shell site
"Shell ROTELLA® T5 Ultra 10W-30 is suitable for use in 2017 as well as some late model engines allowing an API FA-4 diesel oil in this viscosity. Some engine manufacturers do not yet approve the use of API FA-4 engine oils, while some allow limited backwards compatibility to earlier model year engines. Check with your original equipment manufacturer regarding the use of API FA-4 diesel oil."

LINK

The NON-Ultra seems like the right choice.
 

Brutal_HO

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AFAIK, Cummins has not approved the use of FA-4 oils in any B series engines.

 

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