‘17 6.7L PSD 135k mi; HPL 5w40 CC 5.4k mi

[mattd]

5408 miles, 208 hours. An interesting report to say the least .

Not sure why it’s so blurry uploaded. Clear as day in my files. 6.9% fuel. 18 iron, 5 aluminum, 1 copper, 1 lead, 2 tin, 12 silicon, 4 antimony, .3% soot. Viscosity 12.0, TBN 8.54,

Engine is really tough on oil. While I love HPL products, it’s very expensive to use in such a short interval.

@High Performance Lubricants

 

[BobsArmory]

Any idea where all the fuel dilution is coming from?

 

[mattd]

Any idea where all the fuel dilution is coming from?

How the truck regens, in cylinder dosing. So fuel is going past the rings. It also sees relatively short trips in the winter. The engine is usually just reaching full operating temp when I get to work

 

[OneLonelyBurrito]

Do you know how often your truck regens?

 

[mattd]

Do you know how often your truck regens?

I have full control over regens, so yes. About every 400 miles or so. Most of the time regens are done stationary

Last time I checked injector balances rates they were all excellent, I’m going to double check them again this weekend.

 

[OneLonelyBurrito]

I have full control over regens, so yes. About every 400 miles or so

Last time I checked injector balances rates they were all excellent, I’m going to double check them again this weekend.

Every 400 miles isn't super often and seems about right. How long is the regeneration process taking? 6.9% fuel seems like a lot for what appears to be a normal regeneration distance.

 

[mattd]

Every 400 miles isn't super often and seems about right. How long is the regeneration process taking? 6.9% fuel seems like a lot for what appears to be a normal regeneration distance.

30 minutes for Stationary regen.

I work on these and other diesels (big Cummins) for a living, and know the typically dilute the oil with aluminum piston engines. The steel piston engines don’t seem to dilute the fuel like the 11-19 trucks.

 

[OneLonelyBurrito]

30 minutes for Stationary regen.

I work on these and other diesels (big Cummins) for a living, and know the typically dilute the oil with aluminum piston engines. The steel piston engines don’t seem to dilute the fuel like the 11-19 trucks.

Are you only doing stationary regens? Stationary regens will definitely cause more fuel to get in the oil and also should be avoided if possible.

 

[mattd]

Are you only doing stationary regens? Stationary regens will definitely cause more fuel to get in the oil and also should be avoided if possible.

A majority but not exclusively. Over the course of the winter I do more stationary regens due to the service the truck sees. I tow often spring through the fall so most of those are done while driving. From past UOAs there is little difference in fuel dilution regardless of what type of regen is used.

 

[fantastic]

30 minutes for Stationary regen.

I work on these and other diesels (big Cummins) for a living, and know the typically dilute the oil with aluminum piston engines. The steel piston engines don’t seem to dilute the fuel like the 11-19 trucks.

Did Ford go to steel 20'+?
The wear metals all seem to be ok imo.

 

[mattd]

Did Ford go to steel 20'+?
The wear metals all seem to be ok imo.

Yes.

24 MY has a 9th injector in exhaust for regen

Small increase in copper and lead, and antimony which was not present last UOA. Generally speaking though wear metals are consistent. Just tough to change it every 5-6k miles at $300 per oil change with filters with HPL

Tough to really extend the intervals to get moneys worth with fuel this high. Obviously not the oils fault.

 

[OneLonelyBurrito]

A majority but not exclusively. Over the course of the winter I do more stationary regens due to the service the truck sees. I tow often spring through the fall so most of those are done while driving. From past UOAs there is little difference in fuel dilution regardless of what type of regen is used.

I would have expected stationary regens to increase fuel dilution because you have to inject more fuel to get the required temperature increase across the DOC for regen since the engine isn't under a load.

 

[mattd]

I would have expected stationary regens to increase fuel dilution because you have to inject more fuel to get the required temperature increase across the DOC for regen since the engine isn't under a load.

There has been minimal difference in fuel dilution regardless of the time of sampling since the time I have owned this (4.5 years). If you search other UOAs on this engine in general you will generally find high fuel dilution on undeleted 11-19 trucks.

 

[Donald]

My fuel dilution was pretty low until I got up there in miles.

 

[mattd]

@Donald Eventually I’ll delete it. Then I can really extend the intervals with this oil. But waiting for an excuse to do so. (DPF or SCR failure). If it ever blows up it’s getting a 2020+ rotating assembly

 

[Brons2]

Yes.

24 MY has a 9th injector in exhaust for regen

Small increase in copper and lead, and antimony which was not present last UOA. Generally speaking though wear metals are consistent. Just tough to change it every 5-6k miles at $300 per oil change with filters with HPL

Tough to really extend the intervals to get moneys worth with fuel this high. Obviously not the oils fault.

I read these pistons are steel coated with tin, somewhere. Do they limit RPM range? Certainly heavier than aluminum pistons. I would have thought forged aluminum would be the way, but, maybe that would make the dilution problem worse due to the pistons running cooler.

The injector in the exhaust is a big step forward for reducing fuel dilution.

 

[mattd]

I read these pistons are steel coated with tin, somewhere. Do they limit RPM range? Certainly heavier than aluminum pistons. I would have thought forged aluminum would be the way, but, maybe that would make the dilution problem worse due to the pistons running cooler.

The injector in the exhaust is a big step forward for reducing fuel dilution.

The piston itself is significantly shorter than the aluminum piston. The connecting rods are longer to make up the difference. I’ve never weighed the difference between them, though. As far as I know the RPM range is the same for aluminum and steel piston engines.