The thing with comparing mpg is no one will have the exact same commute.
My first four miles consist of approximately 30 sets of traffic lights. By the time I reach the motorway, if reading just over 20mpg we are doing good. 12mpg is not so good - I must have got stopped at almost every traffic light/or its very busy! Compare that with someone that first four miles is open road no traffic lights then clearly there mpg greatly improved.
My first four miles consist of approximately 30 sets of traffic lights. By the time I reach the motorway, if reading just over 20mpg we are doing good. 12mpg is not so good - I must have got stopped at almost every traffic light/or its very busy! Compare that with someone that first four miles is open road no traffic lights then clearly there mpg greatly improved.