Following this with interest.
I have a VW petrol engine that is supercharged and turbocharged, even though it is used gently it still manages to use some oil, around 0.5 to 1 litre for every 2000 miles, I understand that all VW turbo engines are really fussy about the quality of the oil and the petrol. There are no oil leaks and no blue smoke from the exhaust.
The oil I use is Castrol Edge. My previous preferred oil was Mobil 1, I had a car that ran to 160,000 before the head gasket went, the mechanics called me from the front desk to show me the bores and the camshaft lobes, they were amazed that there was no wear at all. They had been a little sceptic when I used to bring in my 5 litres of Mobil 1 at service intervals with the request, 'please use this oil'.
Mrs Vac uses the VW and she knows not to exceed 2000 rpm before the engine oil temperature has reached 50 deg C, this is about 6 miles from home. The opposite holds true, she doesn't switch off the engine when it is very hot for a couple of minutes at tickover. I am talking about a fast run at motorway speeds and then pulling in at services.
I have also heard that the VW turbo engines are very fussy about the octane on the petrol. I use Tesco Momentum which has 99 octane. There is a steep and long hill near my home, with regular petrol the car needs 2nd gear, with Momentum it will pull 3rd. It costs just a few pence more per litre. I haven't check the fuel consumption manually, the readout tells me an average of 30mpg.
The car was bought new in 2013 and has covered 34000 fault free miles.