I've just clocked my last tank of fuel I'd covered 339 miles and it required 49.5 litres to fill up. I calculate that at 31mpg. To be fair the car has only been used for shortish runs, I don't think I did any motorway driving, but still 31 mpg is pretty poor. The car is never driven hard. I used...

Hi all was just reading the thread below about mpg, i have a 05 saab areo, 2.0T, and the trip computer says that i'm getting between 15-18 mpg!! surely this cannot be rite, even though £30 of fuel lasts me about 4 days and i dont do huge milage. so is the trip computer wrong or does my car...