I changed my wife's oil in her Equinox with a Mobil 1 ext perf cartridge filter. It claims to be good for 20k miles or 1 year of service. The car will eat oil if I don't use my mix of oils that seems to slow down the consumption. I was thinking about changing the oil at 5k per the olm, but leaving the filter on for at least 1 more change. Anyone here ever done that?.,,,