What do you experienced DuraMax owners think of this situation? I bought a brand new 2013 Sierra 2500HD SLT crew cab with the DuraMax/Allison combo from our local dealer a few weeks ago. The truck was a dealer transfer, so had been driven from Atlanta to Augusta, GA, but still had less than 300 miles on it. On delivery, the engine oil life in the DIC was showing 65% left. This morning, with 888 miles total, the DIC is showing 56% oil life remaining. Last weekend when I checked the oil, it seemed very black to me. This is my first diesel (have driven GM V8s for about 40 years - but all gassers). Does this seem out of the ordinary to you?