Well thanks everyone, it look like a trip to dealer for me to get this started. When I find out more I'll let you all know.No, the PH8 unit has an internal filter which is actually PART of the oil pan. It is possible to split both, but not recommended. A throughout oil change does include a new pan/filter combination, and is sold as such in combination with the right oil quantity and quality, I.e. a complete kit.