I took an oil sample (through the dipstick) at 3500 miles (engine had been operating for over an hour). Coincidently, my oil change light came on about 30 miles later. Not surprisingly, the results of the analysis show that the change oil indicator is flawed. There was plenty of life left in the oil at the time of the oil change light first appearing. I now have 4500 miles on the engine and will probably change the oil at around 5000 miles. As I and others have observed, the engine oil level is high on the dipstick. In my case, it seems that the oil analysis indicates that the "extra" engine oil is actually fuel. I suspected as much and will show this analysis to the dealer when I go in for my first oil change (complimentary). I'll need another analysis to see if the engine continues to "make" oil.

NOTE: I have had no problems with regeneration or other "common" problem codes. I have been averaging 15 MPG city and recently got 17.9 MPG on the highway over Labor Day (hand calculated).[hr]

 

Hey Colonel, that's interesting. I'm thinking about getting an analysis on mine before the next oil change. I switched over to Amsoil at 1,800 miles, and I just passed 5,000 a couple days ago. I was thinking about using the Amsoil lab, but maybe I should use Blackstone so we can compare "apples to apples."

 

I'd be interested to see another analysis for comparison. I have not used AMSOIL's analysis service (although I have used their oil), but it should be OK too. I like the Blackstone Lab analysis because they provide a short explanation of the results and give a recommendation.

 

FWIW here is my first UOA on my 2007 Ram 2500 w/5.9L

[IMG]local://upfiles/64905/635343B9276742A1B2CF9F40C31C3F50.jpg[/IMG]