Oil sample help

I'd drop the oil out personally and change it out. PM's are different for every manufacture personally IMHO 25K on a service is way to long. I drop the oil and filters out of mine every 12K it's cheap costs less than $150 for 10 gallons of delvac and Baldwin fuel and oil filters. Your iron is elevated, not high but elevated something to keep an eye on, same way with your boron. Keep an eye on it at 250k the levels aren't the worst I've seen, but I've got a motor with 1.4 on the clock that is showing less wear. I'd cut the service intervals down a little bit and change it out a little more. Oil breaks down over time, it's cheaper than putting fuel in, and it's a lot cheaper than changing engine parts.

 

50,000 intervals are fine for fleets minimally maintaining units from 0 to 500,000 miles then trading off for new. That's not so good longer term for the second owner who buys that truck and ends up paying the truck instead of themselves. There's a reason they trade them at 500k miles and also why you see lots of 600-700k miles used trucks with recent inframe's. Shorter oil intervals should make it last longer. Those flagged numbers would drop. Like somebody said, might as well be running lapping compound for oil with stretched out intervals like that.

 

This is just me, lots of research. I am not saying I am right. For many years I dumped my oil at 10 to 12 thousand, those that dump it that early are right. It's the very best thing to do. I have a 6NZ cat, with FS2500 bypass, and I run the Cat 1R-1808 filter Delvac 15W-40. I set my limits at

Iron<75 Chromium<5 Nickel<5 Aluminum<10 Copper<25 Lead<25 Tin<5 Silver<5 Silicone<15 Sodium<10 Potassium<3 Boron>30 Fuel<1.5 Soot<1.4 Old school on TBN 1/2 of new oil so TBN>4.5

I run my oil until one of these conditions is met. Changing both oil filters and fuel filters around 15,000 miles, greasing the truck at 7000 to 8000 miles then again at filter changes

I also send a coolant sample in every 3 months. It checks corrosion metals, contaminates, corrosion inhibitors, sodium ppm, potassium ppm, freeze point, boil point, antifreeze%, ph, total hardness, nitrite, SCA, and specific conductance.

I think my coolant sample is equal or more important than the oil sample. Many engine problems start with the coolant.

This is just me and it works for me

 

I absolutely cannot believe any OEM would recommend 50000 intervals, but they do!!! Rollin Coal is exactly right. Those fleets do extend service intervals to the very max. They do get of them once the warranty is up. I would never recommend to buy one these units. We do services on many fleets that have the 50000 internvals, and I can tell you the oil is complete garbage that comes out of it! Garbage, garbage, garbage!!! Man, is it black and has no lubricity left at all! I know there is scientific testing and studies to prove that the oil is still effective, but I will never agree that the oil is 100% effective! I will never have oil in my engine that isn't doing 100% of it's job!

 

It's my understanding that when you "change your thinking-not your oil" you are sampling regularly and those that test the sample make recommendations about a course of action.

So what is the lab telling you to do?

IMO, change your oil already for gods sake. In the grand scheme of things what is an extra oil change in a 250,000 interval? Except bragging rights that you didn't change your oil for a longer interval? Silly.

 

With 250,000 miles on the oil I suppose it looks good. But the way I see it iron is high, sodium is high, boron is low, fuel dilution is high, TBN is border line. We all have our own way of doing things. If you are comfortable with it, its good. I would not be comfortable with it.

 

I do my oil change every 12,000 miles. My Brother in law has a 2014 cascadia and the dealer told him to to change oil every 80,000. I can't believe that oil actually goes this long without losing its viscosity!