Numptie of the highest order
Re: Smokey car..........Turbo???
I would get the car somewhere as soon as possible to have a compression test done too, even audi shouldn't charge much for this, then you can rule out piston rings etc.
Oil being burnt at that rate is not a definate problem, as Audi say it can burn upto 1Litre of oil per 1000miles, so depending on how much you have actually burn't It might not even be a problem, I would also do what dicky has suggested.
When my engine went It started as being a lot of steam (was cold day) but when you would notice the blue smoke on changing gear - try and have a good look in the rear mirror on changing gear!