Just calculated my mpg with the new fuel hikes. I do 25 miles a day round trip to work and a little town driving. Put £30 in on Sat and calculated 23.6 litres @ 126.9p. I covered 155 miles driving like an utter p%&^$er on the motorway @ 60 and never over 3k. So by my calculations im getting roughly 29mpg. What am i doing wrong in my driving style to not be getting the claimed mid 30's mpg on here?