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Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5132766 06/12/19 10:55 PM
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BillyE Offline
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Originally Posted by Mr4btTahoe

I don't think that's coincidental.


The anecdotal evidence you’ve seen lined up with what Ford saw when they decided to ditch CK-4 in favor of their own F1 spec. Interestingly, DELO is an oil that failed to make the cut. It has lower zinc/phosphorus than almost every other HDEO.

I think you’ve got a lot of choices to consider. First, you can switch to any oil on the F1 list. Another option might be to use a break-in additive for extra ZDDP. Another is the Amsoil option but that sounds very expensive. I think I’d personally just try an oil off the F1 list and see how it goes.

Last edited by BillyE; 06/12/19 10:55 PM.
Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5132798 06/13/19 12:02 AM
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BlakeB Offline
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I believe Chevron still makes their CJ-4 Delo 400 LE 15w40. If you have a Chevron distributor near you I would check with them.

Another possible temporary solution might be WM SuperTech 15w40 individual quarts. While the bigger containers are all CK-4 at my local store, the individual quarts are (at least the last time I checked) still CJ-4.

Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5132971 06/13/19 08:14 AM
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53' Stude Offline
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Check out Rural King as they still have 10w30 HDEO cj4/sm and 15w40 thats cj4 rated

Last edited by 53' Stude; 06/13/19 08:14 AM.


Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5133122 06/13/19 11:43 AM
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njohnson Offline
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Chevron has really reduced the zinc on the Delo CK-4 oils.

Maybe other oils with higher zinc levels will help in your situation.

Rural King sells Delvac 1 ESP 5W-40 and the TDT 5W-40 for around 22 dollars a gallon. They still have the zinc levels above 1200 ppm for now. Mobil may change that in future, but, as of right now, the CK-4 versions are still above 1200 zinc. This is what we are using in older diesel equipment.

Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5133125 06/13/19 11:48 AM
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Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5133177 06/13/19 12:46 PM
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Mr4btTahoe Offline OP
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Currently, it has Delo 400 XLE 15w40 in the case. We're gonna let it ride for a month or two and pull a sample. Planning on switching over to Mystik JT-8 at that point as we can get it locally for a decent price (and meets the F1 standard)

Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5133264 06/13/19 02:46 PM
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racin4ds Offline
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Huh,,,, maybe Ford was on to something when they first announced wear issues with new CK-4 oils.... everyone was so quick to jump on the BS bandwagon and not realize there might have been some actual facts backing their initial stance! I'll side with the team of multi-million dollar engineers from ford over guys on BITOG any day, no offense fellas wink


Just say NO to thin oils and M1!
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Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: racin4ds] #5133434 06/13/19 05:43 PM
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Originally Posted by racin4ds
Huh,,,, maybe Ford was on to something when they first announced wear issues with new CK-4 oils.... everyone was so quick to jump on the BS bandwagon and not realize there might have been some actual facts backing their initial stance! I'll side with the team of multi-million dollar engineers from ford over guys on BITOG any day, no offense fellas wink
Or there is a coolant leak that is slowly destroying the bearings, crankshaft, and other moving parts.


2019 o)|||||(o Rubicon Wrangler Unlimited 3.6L V6 [Castrol Edge 0W-20 + FRAM Ultra]
2018 Mercedes Benz C300 2.0L Turbo [Pennzoil Platinum Euro 0W-40 & Mann filter]
Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: racin4ds] #5134602 06/15/19 04:34 AM
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Garak Offline
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Originally Posted by racin4ds
Huh,,,, maybe Ford was on to something when they first announced wear issues with new CK-4 oils.... everyone was so quick to jump on the BS bandwagon and not realize there might have been some actual facts backing their initial stance! I'll side with the team of multi-million dollar engineers from ford over guys on BITOG any day, no offense fellas wink

The oils were designed by engineers, not ordinary BITOGers. Also, Ford has a panic over diesel specs ever few years. It's just something they seem to like to do. They did it recently. They did it around 1998. They did it around 1984. So, about every 15 years or so, Ford essentially goes on a big marketing campaign to sell Motorcraft oil.

To the OP, Dave Newton made good suggestions. The 15w-40 should be fine, too.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Garak] #5134650 06/15/19 06:55 AM
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BillyE Offline
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Originally Posted by Garak
The oils were designed by engineers, not ordinary BITOGers. Also, Ford has a panic over diesel specs ever few years. It's just something they seem to like to do. They did it recently. They did it around 1998. They did it around 1984. So, about every 15 years or so, Ford essentially goes on a big marketing campaign to sell Motorcraft oil.


How do you think this is a marketing campaign to sell motorcraft oil? They have a list of hundreds of competitors that meet spec. About the only thing that doesn’t meet spec is Delo.

Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: BillyE] #5134654 06/15/19 07:01 AM
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Originally Posted by BillyE
Originally Posted by Garak
The oils were designed by engineers, not ordinary BITOGers. Also, Ford has a panic over diesel specs ever few years. It's just something they seem to like to do. They did it recently. They did it around 1998. They did it around 1984. So, about every 15 years or so, Ford essentially goes on a big marketing campaign to sell Motorcraft oil.


How do you think this is a marketing campaign to sell motorcraft oil? They have a list of hundreds of competitors that meet spec. About the only thing that doesn’t meet spec is Delo.


And Motorcraft 5w40 wasn't even on the approved list for the first year or so. Ford certainly didn't do it to sell Motorcraft oil.


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Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5134673 06/15/19 07:34 AM
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I now have 984,000+ miles on the factory reman of my Detroit 60 pre-emission. All original. It has gotten CK rated oil from the time that Schaeffer first offered it. Wear numbers are virtually unchanged from when the engine had only 40K miles on the reman and still uses oil at the same rate as it has its entire time with me... about 1 qt per 11,000 miles. Last oil change, at 978,415 miles, 21156 hrs, with 22,693 miles / 491 hrs on the oil, the Iron was 16, Lead 6, Chrome 1, Copper 1, Tin 0, Aluminum 3.

The oil change intervals are 50% longer than the OEM recommended drain interval of 15,000 miles / 300 hours.

Oh.... and it has gotten 10w30 in winter and 15w40 in summer. CJ-4 initially then CK-4 when it showed up. Schaeffer syn blend. Both of which are on the Ford approved list if that matters to anyone. Even during all the controversy about CK-4 and Ford, the Schaeffer CK-4 made the approved list with Ford.

Probably should add... the add pack showed Boron 26, Moly 72, Calcium 2010, Phosphorous 1238, and Zinc 1016 on the UOA.


Freedom is not about having the choice to do what you want, but the choice to do what you ought.
Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5135257 06/15/19 08:50 PM
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BlakeB Offline
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Traveller 15w40 has the Ford approval and is regularly $25 for a 2.5 gallon jug. They run it on sale sometimes for $20. That’s what I’m using on my dads LML Duramax right now. The last oil change on it cost $28, you can’t beat that.
His LML doesn’t tick on the Traveller or Delo CK-4 but ticks really loud on Delvac 1300.

The Traveller is CK-4 only and the Delo is CK-4/SN.

Last edited by BlakeB; 06/15/19 08:50 PM.
Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: BlakeB] #5135282 06/15/19 09:08 PM
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Run it until it stops running IMO. The cylinders on the IDI are very soft and the blocks cannot be bored. They are too thin. It’s likey that’s the source of your iron. I’ve had a couple apart and they had a massive lip between where the piston traveled and the ridge on the cylinders. Easily 0.030” bore wear. You’re better off with a 6.9 block and boring it to a 7.3. Good luck and I hope you find a lube that can make it live longer.

Last edited by mattd; 06/15/19 09:09 PM.

2007 Ford F-350 4x4 6.0 PSD

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Re: Best oil for pre-emissions mechanical diesels? CK4 showing high wear. [Re: Mr4btTahoe] #5136674 06/17/19 02:26 PM
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bullwinkle Offline
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Can the 7.3 IDI blocks be sleeved? I seem to recall reading that Ford (or another rebuilder) was sleeving & reboring them. I’m lucky that my 7.3 IDI is actually a FoMoCo factory reman engine, that might be why it’s been hanging in there, although the whole truck only has around 135K on it. If the OP uses a 6.9, head studs would be a good move, believe they had smaller diameter head bolts than a 7.3.


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