Previously I owned a Rabbit diesel so I am not completely unfamilar with diesel maintenance. Now I have a 2005 Volkswagen Golf GLS TDI that has over 10,000 miles on it (and has had its two 5,000 mile scheduled oil changes). It was my understanding that I would need to change oil after this break-in period every 10,000 miles as recommended by the manufacturer using 505.01 spec oil. The dealership is adamant that I need to change oil every 5,000 miles on the diesel or serious wear and tear on the engine and turbo will result. I intend to keep this car a long time (I travel over 30,000 miles per year-mostly highway at 65-70 mph and want to put hopefully at least 300,000 miles on the engine). Being as these oil changes aren't exactly inexpensive and I can't do them myself where I currently live what are your feelings on this issue? It's my understanding that the car will probably fall apart before the engine if "properly maintained" but I'm not sure if the manufacturer's recommendations are dispositive of the issue. Thanks.