Originally Posted by jmar896
It's 350 miles away so unless I decide to go for it I don't think I'm gonna get an oil sample. What is real important about an oil sample, I'm new to diesel stuff and almost all my cars I bought have been new. I would ask my son (he's going to a technical high school in a mechanic program) but he's asleep so I couldn't ask him till tomorrow morning.
Same as you getting a blood test.
Any internal coolant leaks, metal partials (bearing wear), carbon content (ring wear), ect.
My favorite is getting the oil tested every 15,000km before changing it. With a good twin element bypass filter system, I could run my oil 50,000 to 70,000 km before the samples said I needed to change it. It used to cost $15, I have no idea now.
You also want to watch the oil pressure. It should be on the high end when cold right after starting at 2000 RPM (about 60 psi on both mine), but lower at idle. Low oil pressure will show after warm up, at idle. Low oil pressure is caused by bearing wear, oil pump wear, ect. I don't know what normal is off hand, Google will tell you. I'm just to tired from work today to search right now, and it will vary with engine model.
My 92 TC2000 had a blood test before I paid for it. Came back clean bill of health at 435,000km.