Doh! I was so pleased with myself for changing the oil on both my 01 Outback and my wifes 04 Forester until I realized I had reversed the oil filters and put the foresters filter on the outback and viceversa. But seriously, they both fit nice and snug and they seem to be driving fine. Do I need to switch them or can I drive on them for another 3-5K? Both EJ25s.