Had the car one week. Was handed 1l of Castrol SLX Pro Longlife (now replaced by Edge 5w-30) on collection! After approx 180 miles on second day, I checked the oil and found the level half way between "full" and "top up now". At 300 miles, today, it hasn't used any more oil. I've read everything I can find on your website about Audi and oil and conclude: a) oil level was low to start, but will watch it. b) I would be happier to run to 1000 mls on a high spec mineral oil then swap to the full synthetic. The dealer won't like it, but how will this affect my warranty do you think? Incidentally, the dealer charges £90 for an interim oil change (I only do 5000 mls per annum) "Oil costs £18 per litre" they say. I just bought 8 litres for £64. (it won't get any cheaper I think). I would appreciate some advice here as I intend to keep the car long term. It seems crazy to let Audi treat a decent car this way just to keep Fleet operators happy. I'm sure dealers would rather do annual servicing.