it is caused by the factory valve cover. poor design of the baffle near the breather or PCV hoses. 1qt/1K is excessive and an environmental concern. i have installed a air compressor fluid separator in-line to prevent the oil from entering the intake manifold and gumming up the valves, injectors and such. not sure if the problem continues to the 2002 model year PTs but it does plague many '01s. If and when i remove my valve cover i will inspect and correct the situation.
