This is a discussion on Oil Analysis Lab Test Results within the RAM 1500 Diesel Maintenance forums, part of the RAM 1500 Diesel Garage - RAM 1500 Diesel Mechanics Corner category; Originally Posted by SavagePatch Here's my latest UOA. Oil: Mobil 1 Turbo Diesel Truck 5w40 CK-4 Miles: 5,966 This oil was ran over the winter ...
Here is my latest Napa oil analysis performed by ALS in Atlanta. I sent it off for analysis the first time I changed it at 70k miles (I bought it at ~63k). Then I forgot to get a kit the next change at 80k so I skipped the analysis until this latest one at 90k. I'm driving right around 26k/year. Mostly on my daily work commute of 76 miles round trip. Occasional towing of my tractor or other things on my 18' trailer. Love this truck and Lord willing it will last for many years.
Not sure what this report is truly telling me so if anyone has any insight, I appreciate it. Thanks!
So what I see doenut is this: As your mileage goes up, your engine is shedding its break in material. From 80-90k was this index, correct me if I am wrong? Your wear metals have dropped. You have no fuel, soot has even dropped, not like 0.3% is much to worry about. You have plenty of additives left (see if you can find a virgin oil sample for T6 to compare levels), your viscosity remains well within a 40 weight. T6 is known to shear, which is not necessarily bad but some would say its not desirable. From what I can tell, the engine is running good, wearing good and your oil has a lot more life left in it.
Keep sampling and see how the wear metals trend. They may drop a bit more or they may float around the current numbers but a used oil analysis is only a snap shot, you need more data to plot on a graph and see where it all falls into the curve.
Silicon is good as well, which says that the air filter is working. I would extend the next index. Throw on a few thousand more miles and resample. See what your counts are per thousand miles.
Thank you for the explanation. Very informative, These two samples were 20k miles apart (I didn’t sample the 80k change). I will heed your advice. I failed to mention that I got the GDE tune around the time I got the first analysis done.
That is a nice report!!!
It has surely eased my mind, but I guess it could still blow tomorrow.
That's the crappy thing, looks like no warning for the bottom end grenading but if does not, you have one nicely wearing engine.