Oil Analyzers goofed up on the mileage listed on the sample, along with sump capacity and a few other odds and ends. Anyway, the mileage on the sample was around 13K miles.
The only thing that surprises me a little is the Fe at 24, but that still isn't cause for concern. Typically, the Duramax runs low Fe numbers. I ran the oil for another 750 miles or so and dumped. I refilled the crank case with Delvac 1300 15W-40 and changed my full flow & Oil Guard bypass element.
Another note....I drained off a couple of quarts via my Fumoto around 1000 miles before I took this sample and replaced with Castrol Tection 15W-40 just for a little TBN boost.
The only thing that surprises me a little is the Fe at 24, but that still isn't cause for concern. Typically, the Duramax runs low Fe numbers. I ran the oil for another 750 miles or so and dumped. I refilled the crank case with Delvac 1300 15W-40 and changed my full flow & Oil Guard bypass element.
Another note....I drained off a couple of quarts via my Fumoto around 1000 miles before I took this sample and replaced with Castrol Tection 15W-40 just for a little TBN boost.