A former manager of mine had a Bentley GT...and had a servcice done while we were interstate, picked it up after we got back to the airport (they sent a Merc to pick us up).The upkeep and maintenance on supercars is colossal
$3,800, including 12 litres of oil for $1,200.
I mentioned in passing the VW specs required for the Bentley, and that I'd use M1 0W40..."that's the oil that we use".
So I further suggested that next service, he pick up 3x 5 litre jugs, (total value $300), and leave them in the passenger footwell when he booked it in, just like I did with my Colorado....needless to say, I didn't get a free mug....