Unfortunately diesel owners often get screwed by shortsighted environmental policies. If government is going to pass legislation that reduces the sulfur content of diesel they also need to include follow-on legislation that requires auto manufacturers to ensure their diesel engines and components are able to function reliably running the new modified fuel. The CP4 is designed for higher sulfur European diesel fuel.
I think you have the right idea here.
I totally agree, you would think cp4 on this forum were failing daily. I have rarely heard of forum member cp4 failures. Install a DPF, if the cp4 fails then Install a DCR. There are hundreds of thousands of cp4 with 100,000 + miles with no failures.The way we hyperfixate on CP4 disasters, you'd think this happens to members on the daily. When I read these threads I feel like I am waiting to be stuck by lightening. I sure hope nothing happens to my truck, and I am not running anything beyond stock set-up. I am basically doing what @HeavyAssault outlined. Though, I do not run fuel additive often - only during cold snaps. I feel like receiving fuel from high volume places is cheap insurance. It's when you get stupid and use the heavy equipment aux tank that's been sitting for three seasons in the yard.
I do have a recall for this. My truck, is an early 21', ordered 1/2021, took delivery 3/21. Makes no sense as my truck never sat in a railyard nor was affected by any COVID delay nonsense. Seems fishy to me!
S&S, the company who designed the DCR and the DPK actually intentionally set up a cp4 to fail while pulling a heavy trailer on the road to a show. The truck was equipped with a DPK. All this was done on purpose to test the effectiveness of the DPK. When the cp4 failed while pulling the trailer the performance was diminished but did not cause catastrophic failure. They simply disconnected the trailer and continued another 200 miles with the comprised cp4. While at the show thier techs replaced the failed cp4 and installed the DCR, engine started up functioned normally, no damage downstream from the failed cp4. So to answer your question the filter was 100% effective in this instance. What puts you on the side of the road with a cp4 failure is the damage downstream when you don't have a DPK. There is a video produced by S&S documenting all i have shared.
Very interesting.
I’ve watched a couple videos on that, pretty cool. I have a few friends with the DPK and know some very high mileage CP4’S and know of a couple early failures. It really comes down to keeping clean fuel and draining the water separator. My friend installed his DPK, he told me that since everything is coming off just do the DCR. I’m on the fence. I may just do the DCR…
The DCR was available when I did my DPK, my diesel shop mentioned the exact thing. This was my reasoning
, my cp4 may never fail, but if it does based on history, the DPK will save everything downstream and at that time I will install a DCR. If you do timely routine maintenance, clean fuel, an additive regularly, the overwhelming odds are your cp4 will not fail.
Same boat, what’s your plan?
Do the DCR if you think it's worth it. Your cost is going to be a minor addition to labor for the additional work. After the fact it's doing double work.
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