I recently bought a brand new (56) Polo Dune TDI version with the 1.4 engine (as it is the only available verison in the UK), I found the fuel consumpltion is far less than the spec. Example, motorway (M1): 45.6mpg(imperial), city: 43.8mpg, country A road 51-57mpg. But the spec mentioned something like 47.8, 57.6 and 65.8mpg. Anyone got any idea??