Firstly thank you all for the replies to my query on retaining mpg figures. I have now got it sorted. Now another possible problem. the car is a Q2 35 Sport and is 1 week old. For the last two mornings on opening the garage I have noticed a small puddle of what seems to be water (about 2 or3 ") diam. It is on the off side below where the bracket holds the silencer at the rear of the car. The weather has been very warm and dry. Any ideas please. Does the A/C vent at the rear by any chance.