The lubricicity properties of oil start to break down at around 15,000 miles depending on engine and driving conditions. 18 wheelers change their oil every 10,000 and some have a similar filter system called Luberfiner. You can skip one scheduled change, but that is all. I would not recommend driving 30,000 miles on the same oil, no matter what kind of filter you have. Remember the old FRAM commercial: You can pay me now, or you can pay a lot later.