As air filters go from brand new to slightly dirty they become somewhat less efficient in terms of possible total flow but they become more effective at filtering out the smaller particles. According to the service clinics I attended it's better to not change an air filter sooner than necessary.
Could oil filters work the same way? If an engine is relatively new, well maintained, not in severe service, good oil is being used, is there any case to be made for changing the filter every other oil change?
Could oil filters work the same way? If an engine is relatively new, well maintained, not in severe service, good oil is being used, is there any case to be made for changing the filter every other oil change?