Well, on 07-28-08 I added a can of Amsoil Engine Flush to the old Mobil 1 I had in my 2003 Odyssey (with 66,267 miles) ran it for 30 minutes and drained it hot (as the instructions indicated). I then replaced the oil with Amsoil 0W-20 and installed an EaO13 oil filter on it. I decided that I'd...