The best way to check is to not mess about with half tanks but to fill up your car completely until the pump clicks off. Make a note of your mileage or reset your trip counter. Then drive your car until the red light comes on and fill again until the pump clicks off. Check your mileage again. This will give you the number of miles you have travelled over a set amont of fuel. Divide the mileage by the number of litres you put to top your tank up again and you have the number of miles driven per litre. Multiply this figure by 4.56 and you will have your mpg. I would have thought on a sensibly driven MINI One you would get 35-40mpg with a range on a full tank of 350-400 miles.
"Do try to keep up Nigel!" |