Obviously something needs attention.
Archoils a start just try continued use w/fuel cleaner in the tank also. Hope it get's better for you after some time.Driving is roughly the same. Not any big city stop & go. Rural roads and some in small town driving.
I almost always use Mobil diesel which supposedly has their advanced diesel additives.
I have started to use Archoil diesel treatment.
I was using Stanadyne in the gray bottle every other tank and then switched to Archoil in every tank.Do you use a fuel lubricity additive and cetane booster? That is important for these engines. Especially the lubricity.
Many of them dilute the fuel . Mine is always high.I was using Stanadyne in the gray bottle every other tank and then switched to Archoil in every tank.
But I always use Mobil diesel which I am told has Mobil branded additives, so better than plain diesel.
How many PSD have the same problem I have but don't do a UOA so they don't know?
As high as this UOA at over 8%? I typically go two clicks of the OLM before an oil change, this time I was mistaken and thought this click of the OLM was the second but it was only the first.Many of them dilute the fuel . Mine is always high.
I think this is the correct screen for injector balance. With the first value being .36.Here is a screen shot of the injectors. They look consistent so maybe not an injector problem?
View attachment 224400
OK. But what explains an increase in fuel dilution as I put more miles on the truck? Most of my oil changes have 16K on the oil with less fuel dilution than this time at 8K. I would not think regens would cause the fuel dilution to get worse over time. While higher mileage would mean more wear for the rings, I would not think the increased wear would allow more of the extra fuel during a regen to slip past the rings to the oil sump.It may be the DPF regeneration strategy. They DUMP fuel past the rings on the exhaust stroke. My F450 would rise 2 quarts ever an oil change. It is not good for the rings as diesel fuel has very little lubricity.
Add a bottle of RL 85 Plus the first tank, then 1/3 bottle after that. See what happens. I think you will be pleased.
I use it for CP4 lube and water handling. It lessens the smoke on the old mechanical stuff as well.
I am not sure how to track a REGEN. Once and awhile I see a REGEN msg but it only lasts 5, maybe 10 seconds. I'd guess I miss most.Everytime it regens you have fuel wash passed the rings. It you have a regen every 500 miles over the course of 8,000 miles, you have 16 regens. If you change the oil every 5,000 miles, you only have 10 regens over that oil change interval. That means less fuel in the sump. Can you track your regens? You might be having one ever 200 miles now, vs 500 miles as before. I'd start by tracking regens.
You should try a quality injector cleaner first. If that doesn't work. Maybe the DPF is needing an oven bake. If you are experiencing more frequent regens with the same commute, that is likely.
Throw a bottle of Redline 85 Plus or Optilube in. After that get back to us.