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HHB, The op has been experiencing oxidation, oxidative thickening, as well as increased wear metal numbers. Here is a quick read on how temps effect engine oil. https://www.machinerylubrication.com/Read/349/egr-oil-diesel-engines

This uoa looks a lot better with just one run of the mc oil. Wonder how the motorcraft oil would do if the egr was plugged back in.

That’s why I am curious about the hours as well. Increased hours could explain the small spike in wear metals. As dnewtons said though. Good wearing engine. I plan to track my miles and hours per oci just so that I have 2 points of reference for wear pattern. Nice Report. Thanks for sharing

Donald, Any idea of hours on oil?

Hoping Beercan isn't offended , but I snipped his most recent UOA and attached it for comparison. His run at 21k miles has similar results to mine. Makes me lean more towards break in wear.

Over on the tdi club, someone is having similar issues with ck4 rotella t6 and oxidative thickening with an early 2000s tdi running 10k interval I believe. Eager to see the motorcraft results. Thanks for sharing!

That Rotella is looking good in your engine.

Originally Posted by LubricatusObsess Interesting. Any reason you didn't go with 15W-40? I see you are in Pennsylvania. Doesn't get too cold there? How do you like the engine so far? LO, No major deciding factor. Owners manual says 10w30 for typical use. Roadrunner runs his power stroke hard...

Originally Posted by BeerCan Do you use any fuel additives? I was using an fuel additive that had iron in it. You can see the 2 reports with high iron and how it went down when I discontinued use. This is 53k of reports. BeerCan, I do not use fuel additives. I just run 5 % bio that is...

Op, Any updates on this? What came of the visit to your diesel shop?

Cj4 does awesome in a pd engine which is what the op has. I have been running it for a while in my 04 bew. I would assume the ck4 would so equally as well. I have not done a uoa on ck4 in my 04 since I still have a stash of cj4. You are correct the flat tappet tdi engines are picky about oil for...

This has my curiousity. The oil thickening seems excessive for the miles on this oil. I wonder how many hours are on these runs. OP. Have you been tracking hours at all?

x2 Looks like a good blend. Phosphorus and zinc are above 1000 ppm. Decent bit of boron as well. That is from a uoa i found posted in 2012. Assuming they didn't change the formula.... The oil in the uoa has a 235hr run on it.

Originally Posted by SAJEFFC Originally Posted by PDRig Originally Posted by SAJEFFC Originally Posted by PDRig My vote is for the motorcraft 15w40 if you will use the truck primarily for towing based on your location. To be honest you would probably be fine with the motorcraft 10w30 as well...

Originally Posted by SAJEFFC Originally Posted by PDRig My vote is for the motorcraft 15w40 if you will use the truck primarily for towing based on your location. To be honest you would probably be fine with the motorcraft 10w30 as well. The 10w30 holds up well in my ‘17. It will be primarily...

My vote is for the motorcraft 15w40 if you will use the truck primarily for towing based on your location. To be honest you would probably be fine with the motorcraft 10w30 as well. The 10w30 holds up well in my ‘17.

Originally Posted by 2015_PSD Originally Posted by PDRig My thought process for the high iron, is the time in the sump. I have 425 hours on this oil sample. I have not seen a lot of people posting hours and mileage together. A few I had seen on bitog were around 200 hours and 10000 miles. With...

Originally Posted by 2015_PSD Originally Posted by PDRig I use the inhibit feature and stretch it usually to 500 miles between regens. Do the regens run for about 30 minutes or so when they do run or longer? I had higher fuel dilution during the winter months, but still did not have iron levels...

I use the inhibit feature and stretch it usually to 500 miles between regens.

10,000 miles/425 Hours on oil. 25,200 miles on unit. Motorcraft dino 10w30 diesel oil with 13 ounces of Schaeffer 132 added. 1 ounce zddp added halfway through the run to help boost numbers (probably will not do this again this oil change). . Let me know what you guys think.