Yes, my 850 did as well. I didn't go near as long as you. Changed my oil and filter at less than 3 hours. Did it again around 10 hours. I also changed my other fluids around 10 hours and they looked terrible. Get your front and rear diff changed as well as the transmission fluid ASAP! The magnets will be completely covered with lots left in the drain pan.
Remember that the within the first hour or so those new piston rings are filing themselves into the cylinder wall. No reason to let that stuff float around in there. The manual is nuts for saying to wait so long.
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