I wound up going full synthetic like I did in my Porsche Cayenne S. I used Valvoline full synthetic. I went to Tire Kingdom and got it done for $72. They didn't charge extra for the extra quarts it took over the standard 5 (8+ quarts total). I was happy with the price. I shopped around and the range I got was $70-$100 When I had the Porsche Cayenne most places wouldn't work on it. It would cost me $145-$200 for an oil change (also 8+ quarts) at one of 2 German places I would take it to. The dealer was $200. So all in all I'm satisfied.