In all my years of changing my oil I have always done 5 qts and a filter. I recently read an older thread, SN 200 burning oil, in which PCM advised 4qts with filter and then adding 5ozs or so at a time until level is at full mark. A friend recently had her 2011 200 with the Ex 343 at the dealer for repair. While there the oil was changed and according to the repair order 6 qts were used. Was anything different in 2011? 4 1/2, 5, 6 which is it?