I'm not really sure the oil even costs extra. The recommended change interval is 10,000 miles, and my local dealer charges me $87.50 (which I take it is rather low). That's $8.75 per 1000 miles.It baffles me why anyone would buy a $50K+ premium precision vehicle like the Touareg and then fret over an extra few dollars for an oil change.
My previous car's oil change interval was 3500 miles, and used to cost me $33. That's $9.42 per 1000 miles.