Hi there, I purchased a 09/10 Audi A5 Sportback S-Line 2.0 TFSI last week and I put in £25 of unleaded and after doing about 35 miles, the petrol light has come up. I noticed when reading the book that you should put in premium unleaded. I can't remember correctly, but I may have put in standard unleaded. Could this have been the reason why I have got such short mileage on £25 petrol at a price of £1.40 P/L? Car mileage is 13K, so it's a relatively new car. It should do around 43MPG according to the book. Can anyone help me out here?