Took my 2014 Cayman S in for its first ( 15,000 KM ) service. $440 for an oil change, although they did wash the car and clean the interior. The dealer is over 2 1/2 hours away and I was wondering if there are any warranty requirements stating that the car has to be serviced by a Porsche dealer. The next town over from me has a garage that is recommended by the Porsche Club of America. Can I take it there for regular maintenance without voiding the warranty?