I also do think you should contact youre dealer because youre factory warranty is up & you still have low hours.My DS's coolant showed up in oil after aprox. 75 hours.....the problem was head was not torqued to specs and the mechanic at dealership found 2 head bolts alittle loose, but it took that long to show symptons..so maybe the head should be checked & retorqued to specs just to be on safe side.
My Ds was manufactuerd 11/99 also,because the time was not up on warranty when this happened Bombardier fixed it for FREE!.