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I send my oil out for analysis at each change. I use Polaris Laboratories. They are the independent testing lab for both Cummins Inc. and Amsoil. You can buy the sample kits from Amsoil directly on their website, or buy them at your local Cummins service center. I like to pull a sample while my oil is hot, so I also installed an EZ oil drain valve in place of my standard oil pan plug. It makes pulling a sample clean, easy, and safe.
I would think that if your DPF got up to 97% it would have gone into an automatic regen. Mine will not get that high before it goes into regen. I think when they hit 100% you get the see dealer message.
Thursday the 28. 100 miles after the prior Regen.
For what it's worth, I've run the gamut with my '22 HO CTD. I drive 80:20 highway/town, tow regularly and had no regen problems until about 20,000 miles, then constant regens like you're experiencing, with equally constant fuel dilution of my crankcase. Here's what the dealership tried (including at least three STAR cases): replaced the MAFS, no change; replaced the boost tube, no change; did the fuel system check and injectors were fine, no change; pulled and inspected the fuel pump, found no issues with the O-ring and reinstalled, still no change; replaced the DPF and voila'! I've had two 24 hr regen cycles and the EVIC DPF screen stays at zero until about 19 engine hours then hovers around 10% until the 24 hour timed regen kicks in.
On my regeneration data spreadsheet below, the red arrow indicates when I switched fuel stations. You’ll see that the next regeneration after switching was very short interval, but the truck progressively improved afterwords. If I remember correctly, the truck was already at about 25% soot load when the new fuel was introduced, so it wasn’t a complete fresh start. After switching the truck has improved substantially. I spoke with the fuel specialist for the local chain that supplies the fuel to that station and confirmed it is indeed B2 (2% biodiesel 98% petroleum diesel) with the BP invigorate additives added prior to the fuel being delivered. My truck has done a 24 hour Regen repeatedly now with little or no soot ever registering on the DPF gauge. The truck sees pretty much the same drive cycles every week, so driving conditions really do not change, outside of environmental things like temperature and rain. I see good passive regeneration regularly on the highway. Rain is the only thing that does seem to drive up soot loading some now, as it cools down the DPF and makes it harder for the system to keep the heat constant. I’m usually unloaded all the time, so the truck isn’t “working” too hard. I would assume my temperatures are just over the threshold for when passive regeneration becomes effective. Very thankful to have figured it out.
That corresponds with I’ve seen. After my last active the PID showed 50.2%. It ended right before I got home. When I restarted a few hours later it showed 28.63.
Thanks for the table. Invigorate. That is BPcorrect?
Thanks for the info. I will share this.
Yes the chain locally is “Coen” but they were mostly all BP and Amoco stations. Coen recently has been changing their branding over to fully Amoco, but the “invigorate” additive is still being touted under that brand.
Now the real test will be: does it passively regenerate on the highway when it’s unloaded?
Where is the hour meter for the DPF? I have never seen anything remotely close to that?