Franklin Delano Roosevelt (January 30, 1882 to April 12, 1945) was the 32nd American president who led the United States through the Great Depression and World War II, greatly expanding the powers of the federal government through a series of programs and reforms known as the New Deal.
Whereas a Porsche with 14 quarts at $8-9.00 plus filter (another $15-20) will run you $135 to $150 for an oil change so either be on good terms and have an account with an Auto parts store or have $$ for all the Porsche repairs..
The oil filters are also very expensive (about 15 bucks a pop). the 250-300 dollar mark sounds about right for this and a tranny flush. after you get your tranny fluid swapped when you first get the car (always a good idea), you really shuoldnt have to do it again. Use a good synthetic gear oil too. Doing it every oil change is just a waste of cash. Based on what paul S said, maybe you do want to bring it to a porsche mechanic.