cummins isx oil sample

I'd test it again at the halfway point in your oil change interval...preferably at a different place, or grab two samples sending one to two different places. I usually get my oil changed at the Sapp Bros truck stop local to me where they do oil sampling and they've come up with different results on the same sample. SOOOOOOOOOOOOOOOOOOOOOOO...how much faith should be put into that...??

 

Even Cummins says to never perform any tear down based on oil sample reports. They are only a guide. In your case I would run another full interval and retest. I would want to see at least two sample reports back to back with consistent readings. Reports with high ppm of wear metals may be just an indicator that the oil lubricity is breaking down due to intervals that may be too long. Intervals aren't always based on time or mileage, but also load and operating conditions. Truck engines really don't record mileages or hours as being hard hours, or soft hours, they are just hours. If you had one service interval with more hard hours than normal your oil sample report will show that. Nothing is wrong, the engine was just worked harder and the oil should have been changed a little sooner. This time of year is murder on engines because of cold starts aswell.