I run a lot of 15-40 M/C dino oil, oil reports are fine.

But if it was going to be below 20F then I switch to T6

 

That's not what it means to me. If the label doesn't explicitly address the CK-4 spec, then it doesn't meet CK-4. Even if it meets the CK-4 spec, to use it in a Power stroke engine, it needs to also meet the Ford spec.

 

You must have missed it. If you look at the label on the "bottle" it does specify CK-4

https://www.schaefferoil.com/full-synthetic-5w40.html

 

But that's not what you said. If it had achieved both specifications you should have said so. You only mentioned CJ-4.

 

I didn't mention CJ-4, the data sheet on the Schaeffer site pdf specs said it exceeds CJ-4. You can argue semantics all you want. It is their words not mine. The Schaeffer Supreme 9000 SAE 5W-40 oil listed does not say it meets Ford specs if you take the time to read it all.

My only point of contention is that Schaeffer 5w40 oil is now CK-4 rated and not CJ-4. Schaeffer is like other oil sellers, Valvoline, Mobil 1, Delo, etc, they are now producing oil to the CK-4 specifications.

I have enough CJ-4 oil for two or three more oil changes. Maybe by then, more oils will meet Ford specs even if the oil doesn't list Ford WSSM2C171F1 on the bottle but is on Ford's approved list.

 

If it's CK-4, it should say so in the data sheet. To me, "exceeds CJ-4" just means exceeding the requirements of CJ-4. Because it exceeds the requirements of one standard doesn't mean it meets the requirement of another standard.

The picture shows "CK-4" on the jug but nowhere can I find that 9000 is actually CK-4. Curious.

I'll be running motorcraft for the first couple changes but then will switch to Schaeffer's. (Either CJ-4 or one of the approved CK-4's)

 

I sure hope that CK-4 exceeds the CJ-4 as it is the next and the newest rating of the diesel oil per the API.

Why don't you contact Schaeffer customer service and ask them if their Schaeffer Supreme 9000 SAE 5W-40 oil is CK-4 or CJ-4 since you don't want to rely on the fact the photo shows CK-4 on the jug?

If you read what the API says about CK-4, they state it exceeds CJ-4 and other older diesel oil ratings (CI-4 with CI-4 PLUS, CI-4, and CH-4) else why would the latest API rating be CK-4?

From the API website....

"API Service Category CK-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards as well as for previous model year diesel engines. These oils are formulated for use in all applications with diesel fuels ranging in sulfur content up to 500 ppm (0.05% by weight). However, the use of these oils with greater than 15 ppm (0.0015% by weight) sulfur fuel may impact exhaust aftertreatment system durability and/or oil drain interval. These oils are especially effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. API CK-4 oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related viscosity increase. API CK-4 oils exceed the performance criteria of API CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 and can effectively lubricate engines calling for those API Service Categories. When using CK-4 oil with higher than 15 ppm sulfur fuel, consult the engine manufacturer for service interval recommendations."

https://www.api.org/products-and-ser...l-c-categories

Yes, the API website says CJ-4 CI-4 (plus also) and CH-4 are "current" oils. This does not mean they are still in production. It just means that they will protect current diesel engine oiling and aftertreatment system durability requirements and still usable till supply is exhausted.

 

If that were the case, then why would Ford feel the need to create their own standard? In Ford's opinion, all CJ-4's are OK, but only some CK-4's. So I think it's safe to say that Ford engineers would disagree with your statement that just because an oil is CK-4 it's better than CJ-4.

 

You appear to be saying that I said it exceeds CJ-4 standards for protection. I DID NOT SAY IT. The API organization stated it exceeds the CJ-4 standards for protection. There are many vehicle manufactures that says the Schaeffer Supreme 9000 SAE 5W-40 provides the required protection of their engines.

These are the manufactures that says it is approved for use in their diesel engines and no, Ford is not listed. I have never said it was listed.

https://www.schaefferoil.com/documents/244-9000-td.pdf

Supreme 9000 SAE 5W-40 meets and exceeds the following manufacturers’ specifications and requirements: Military Specifications MIL-PRF-2104H and A-A-52306A; API Service Classifications CJ-4/CI-4/SN; CI-4 Plus; Global Specification DHD-1; JASO DH-1 and DH-2; Mack EO-O Premium Plus-07; Caterpillar; Caterpillar CAT ECF-1-a,CAT ECF-2, CAT ECF-3; Cummins CES 20081; Detroit Diesel 7SE 270; Detroit Diesel Power Guard Oil Specification 93K218; MTU Category Type2 and 2.1; Navistar; ACEA E7-16 and E9-16;Deutz; Mercedes-Benz MB 228.3 and MB 228.31; Volvo VDS-4; MAN271; MAN 3275-1; MAN 3575; MTU Category Type 2 and 2.1; Renault RLD-2 and RLD-3; Scania LA, LD-F and LDF-2; Iveco; and DAF

You seem to be reading it as I am the one claiming the oil YOU want to run is better than CJ-4. I am not nor have I said Supreme 9000 SAE 5W-40 was better than CJ-4 nor have I said Ford approved the Supreme 9000 SAE 5W-40 oil.

https://www.fcsdchemicalsandlubrican...SSM2C171F1.pdf

I have stated earlier and it seems you have overlooked, that the oil does not appear on the Ford WSS-M2C171-F1 as an approved CK-4. I stated earlier that you would have trouble find any Schaeffer Oil that was still CJ-4 rated. The CK-4 rating has been out for over a year now and I would venture to say you can not find any CJ-4 or any brand on the shelves of most all major places that sell diesel motor oil. That is why I said I hoped you had a stockpile of the Schaeffer CJ-4 oil as the current oil is CK-4 rated.

Geezzz....Go back and re-read it all....not just bits and pieces....try to understand what I have said and why I said it......

 

I'm trying to confirm from Schaeffer if it is actually CK-4. If it is not, then of course it won't be listed on the FCSD list. Thanks for posting the link to the technical data sheet that I shared 12 posts ago, and the link to the FCSD once again.

I'll share what I find out from Schaeffer's. It think it's possible the TDS is an outdated version, but will wait to see what they say.

 

I'm going to go with their TDS is not up to Date. The TDS I found for 9000 shows a date of September 2019.

This link to their product listing states that it

Exceeds API Service Categories for heavy-duty-diesel engine oil: CK-4, CJ-4, CI-4, CI-4 Plus and older.

https://www.schaefferoil.com/full-synthetic-5w40.html

Being that it's now CK-4 rated and not on the ford approved list, I Wouldn't run it. I'd find a different oil on the list approved by Ford, but thats just me.

 

We got off track.....

message to all is don’t run 15w40 when the temps get below 20 degrees F.

the video makes no implication about increased engine failures due to “brands” or “ck? “Ratings.

only about increase in engine failures associated with cold weather operation while using 15w40


me personally would not feel it’s ok to run 15w40 at 21 degrees but not at 20,

 

Agree. I'd rather run their 10w-30 that is on Ford's list.

speakerfritz, I wouldn't be too concerned about running 15w-40 at colder temps if your truck is kept inside or plugged in. If it's going to sit outside in subzero temps and be subjected to cold starts, then a lower viscosity oil would be prudent.

 

Heard back from Schaeffers on the 5w-40. Here's what they said:

 

Motorcraft oil meats the CK4 requirements.
Again you spend extra $$$ to get the diesel then you don't want to use Motorcraft oil. Why did you even buy a Ford? I hear the the Duramax runs on anything.