convert a tranny lol, the size is surprising once your use to them you can fit the small wheel base ones in some tight spots considering you are a decent driver too, there no bigger then a salon family car. Our old transit was 2.5l diesil did 350-400 miles to a tank which was 60litres i dont know how to convert it to mpg? your get around 400 miles to a 60litre a tank as your doing long journeys. and we never had a problem with it.