BerserkerCatSplat
Hormone Induced
Original owner's manual says every 12,000km (7500 miles), I do it whenever I have time between 10,000km - 12,000km.
Mobil 1 is a synthetic oil. I don't know if the Shell is or not.
I don't understand why you would follow VW's 30,000km intervals. An oil change is so easy and inexpensive to do and it gives you a piece of mind that your engine is running smoothly. Why risk having sludge or other potential problems down the road for a saving of about $20-50?