2017 6.7L 4976 miles, 185 hours HPL 5w-40 premium

[mattd]

This was sampled and not changed. Truck is on a bypass system, 20 micron primary, 2 micron bypass (amsoil filters and filter head). Silicon is still leaching from upper oil pan reseal about 9000 miles ago. Zero evidence of any dirt in air intake tract. Oil has been in service since October. Also used to tow a 37’ TT since April. Lots of short trips in winter as well. I also installed a high idle switch using PTO wiring connections to eliminate low speed idle time at the time of LOF.

 

[fantastic]

This was sampled and not changed. Truck is on a bypass system, 20 micron primary, 2 micron bypass (amsoil filters and filter head). Silicon is still leaching from upper oil pan reseal about 9000 miles ago. Zero evidence of any dirt in air intake tract. Oil has been in service since October. Also used to tow a 37’ TT since April. Lots of short trips in winter as well. I also installed a high idle switch using PTO wiring connections to eliminate low speed idle time at the time of LOF.

Are you using an additive? Perhaps the silicone is causing the Oxidation.

 

[mattd]

No oil additives. The oxidation is from the PAO base oils.

 

[Pedro I]

@mattd

The fuel is 5% higher and the oil viscosity has decreased.

How are you going to tackle this dilution problem?

I understand that it is not healthy to stay for long periods and in a large percentage. Having a bypass filtration system can retain some of the wear and not be able to see the actual wear caused by dilution.

 

[mattd]

@mattd

The fuel is 5% higher and the oil viscosity has decreased.

How are you going to tackle this dilution problem?

I understand that it is not healthy to stay for long periods and in a large percentage. Having a bypass filtration system can retain some of the wear and not be able to see the actual wear caused by dilution.

That was the first sample on a previous fill. The current sample is the bottom. There’s was “<2% estimate”. I take that none measurable using GC.

 

[Pedro I]

Perfect, everything is normal then.

 

[The Critic]

HPL Premium or Premium Cold Climate?

 

[mattd]

HPL Premium or Premium Cold Climate?

Premium cold climate. Thanks for pointing that out!

 

[RDY4WAR]

That's a good report. Thanks for posting.

 

[drtyler]

Is this the latest CK4 oil or the previous version?

 

[Overfill]

No oil additives. The oxidation is from the PAO POE base oils.

fixed.

 

[mattd]

fixed.

PAO per this PDS.

https://www.hplubricants.com/wp-content/uploads/2021/08/HD-CK4-Engine-Oil-PDS.pdf

 

[RDY4WAR]

PAO per this PDS.

https://www.hplubricants.com/wp-content/uploads/2021/08/HD-CK4-Engine-Oil-PDS.pdf

Polyol ester (POE) is what causes the oxidation value to be high. That's what he's referring to.

 

[mattd]

Polyol ester (POE) is what causes the oxidation value to be high. That's what he's referring to.

Ah ok, thanks for clarification.