In days gone by I drove a car that we never changed the oil or oil filter in. In keeping with the ULTRA style of thinking we just would add 2 quarts of USED oil every 20 miles. Car ran great and we sold it for what we bought it for. This car was a great learning experience for me, it was my first automatic to manual transmission swap, complete with the black and decker custom drilled flywheel. Keith Hammett