Can anyone give me an idea of the average mpg they are getting from their GT. Ive had this car about two weeks now and im averaging 20/21 around town and 26/27 on motorways. This is just normal driving putting my foot down now and again but on the whole steadyish driving. Im also getting a slight judder on idle that gets even worse when heater is on no4. Just wanted a bit of a comparison to see if this is normal before contacting the dealer hope you guys can help.