CK vs CJ oil
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Tuned
Joined: Feb 2015
Posts: 434
Likes: 18
From: Phoenix Area
CK vs CJ oil
It is time again for the yearly service on the green demon, and I have seen various threads about the new oils for diesels. I read through some and came away more confused than anything. What is the consensus on what type of oil to use in our trucks? I used to just always grab Valvoline 15/40 diesel oil, however Im now paranoid with the formula changes required by EPA that this oil isn't to spec anymore.
So I ask you all, what oil is currently considered acceptable for our engines?
So I ask you all, what oil is currently considered acceptable for our engines?
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,352
Likes: 5,946
From: Lake Hartwell, GA
Link 1 in 6.7 section.
https://www.ford-trucks.com/forums/1...-fa4-oils.html
Link 2 in 7.3 section.
https://www.ford-trucks.com/forums/1...-ck-4-oil.html
I bought enough Rotella T6 a couple months ago for 2 more oil changes. So, I am good for the next year or so until this all gets sorted out for sure.
https://www.ford-trucks.com/forums/1...-fa4-oils.html
Link 2 in 7.3 section.
https://www.ford-trucks.com/forums/1...-ck-4-oil.html
I bought enough Rotella T6 a couple months ago for 2 more oil changes. So, I am good for the next year or so until this all gets sorted out for sure.
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
Since you never seem to find the appropriate links in the beginning of the threads, here's the latest list I've seen. The Valvoline heavy duty 15w-40 makes the list as approved, but I don't see premium blue on there. Around here, Wally World carries the Valvoline heavy duty.
Post Fiend
Joined: Sep 2006
Posts: 7,426
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From: Sioux Falls, SD
Since you never seem to find the appropriate links in the beginning of the threads, here's the latest list I've seen. The Valvoline heavy duty 15w-40 makes the list as approved, but I don't see premium blue on there. Around here, Wally World carries the Valvoline heavy duty.
5W-40 section, labeled as Premium Blue Extreme.
why the don't have it listed as Valvoline is beyond me.
Elder User
Joined: Sep 2008
Posts: 996
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From: TALLAHASSEE FL
So is the standard shell rotella 15/40 still good ? I need an oil change also and that's all ive been running for years
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Senior User
Joined: Oct 2006
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From: south cali
I've been running the Rotella T5 Synthetic Blend. I've noticed that my injectors idle quieter, so i will continue run it.
I get it at Wally World.
I get it at Wally World.
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Lead Driver
Joined: Dec 2006
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From: San Diego, CA
I've run out of my Mobil Delvac CJ and all I can find on the shelves now is CK. F350-6 attached the latest sheet. For the latest from Ford you can go here:
https://www.fcsdchemicalsandlubrican...ry=Motor%20Oil
Once I get my truck running it will need an oil change (new cups and sticks) so I'll either have to change brands or hope for the best.
https://www.fcsdchemicalsandlubrican...ry=Motor%20Oil
Once I get my truck running it will need an oil change (new cups and sticks) so I'll either have to change brands or hope for the best.
Fleet Mechanic
Joined: Dec 2008
Posts: 1,787
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From: Northern Illinois
Also my understanding is that they could legally fill a bucket with a label CJ with CK oil as it meets or exceeds the specifications of the product label. We do things similar to this all the time as a running change. Use up the old packaging with the new product rather than throw it away.
I have both Mobil Delvac CJ and CK labeled 5 gallon pails at home. It is possible that the oil in the CJ bucket only meets CJ and not CK? sure. Is it also possible that the oil in the CJ bucket meets the CK and CJ specification? sure.
Without knowing when they stopped producing the CJ oil and a date code on the bucket you cannot know with absolute certainty that the oil does NOT meet CK specification. All you know is that it meets or exceeds the CJ as labeled.
I have both Mobil Delvac CJ and CK labeled 5 gallon pails at home. It is possible that the oil in the CJ bucket only meets CJ and not CK? sure. Is it also possible that the oil in the CJ bucket meets the CK and CJ specification? sure.
Without knowing when they stopped producing the CJ oil and a date code on the bucket you cannot know with absolute certainty that the oil does NOT meet CK specification. All you know is that it meets or exceeds the CJ as labeled.
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
It turned out OK though as the Heavy Duty dino is on the list, and it's cheaper.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I don't know if it has to do with who submitted samples for testing, or maybe when they submitted them and the testing isn't done yet. I do know that Motorcraft 15w-40 didn't make the approved list the first time around, but has been added to the latest version.
Perhaps the others will be added later. Or perhaps we've all fallen for the brand name thing and been overpaying for our oil.
Edit from the 6.7 forum: Apparenlty Ford isn't the only one finding issues with CK-4
