- May 13, 2013
- upstate NY
Good deal! I didn't know how many applications they were made for, but I guess the diesel pickups would be an obvious one.
Originally Posted By: PiperOne
Love those PowerCore air filters. Use them on my Duramax's.
Oh goodness...thanks but I have only worked within Detroit's guidelines. I am using the data, but so far, only to give me the confidence to go the approved distance. Like I said in my update, I'm over the fear of such long OCIs. I thought they were geared more towards the big fleets who stretch everything to the limit, but my results show that the oil isn't being challenged yet. I will still limit my truck to 65k mile intervals (while I have warranty) because that is the longest approved for the DD13. The larger DD15 is approved for 75k mile OCI with good fuel economy. As far as sampling throughout an OCI, I'm fine with going straight to whatever mileage I end up at without extra sampling (again 65k at most). So far, 55k has been easy and as long as the oil remains where it needs to be on the dipstick and I can't find any glaring issues, I will just run until it's time to drain. I hope that doesn't sound bad. I'm very much "in tune" with my truck so I think it'll be fine. To answer your question, the only way to live sample is by pulling a sample through the dipstick tube. No drain valve on the pan and I don't think that there's a port to connect to. My Cat engines had ports but I don't believe that this engine does. I honestly haven't searched for one so not sure. As far as low wear rates, all of my HD diesels have had <1 ppm/1000 miles. So while this engine is showing very low iron numbers, it's not amazing in comparison to my past engines. I guess it may be better than I thought, because this engine is being choked by the restrictive exhaust and using EGR. Guys with pickups and diesel cars see enormous improvements after deleting EGR and everything down stream. I am most amazed by the TBN retention and the viscosity staying so well in range. Healthy, efficient engine, yes; but wow. I personally have never seen such performance in any of my big diesels over the last twenty years. I believe that the new CK-4 oils have nailed the touted improvements. Detroit (and others) extended their OCIs considerably with the new category and I'm showing some results in my reports.
Originally Posted By: dnewton3
That is fantastic wear for an OCI of that duration, with no BP element. Simply outstanding, and hard to believe because it's so good. That engine must be very clean running to have such a low soot level after such a long run, and no make up oil to dilute results. Soot is often limited at 3%-5% depending upon OEM. You're at 1/10th that value! Hard to express how impressive that is! And no make-up oil to dilute the results too. Essentially you have practically no intrusion of silica, and a very low soot load. The two major contributors to wear are super low, so it's no wonder your wear rates are so steady and low, even after 55k miles! Who needs BP when you're running that clean? 65k miles is totally doable. 75k is likely easily attained. More is possible. (All verified with UOAs obviously). I do understand your hesitation to continue to stretch it out; everyone has a self-imposed limit where they get a bit queasy. I assume you have a way to take a live-sample? I would suggest that you run to 50k miles, sample and decide. Then every 10k miles after that, take another sample. Yes - taking lots of UOAs can be a tad tedious (although a live-sample port makes it really easy actually). And there's cost involved too. But a UOA is far cheaper than 10 gallons of lube! I admire your dedication and ability to let the data drive your decisions. Stick with it! At the rate of wear you're seeing, that might be the last engine you buy.