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I did my 6th fill up of Dafny today. The trip computer reading for the whole tank was 56.6mpg over 350.4 miles since the last fill up (brimmed)
However it took 29.93 litres of petrol to brim the tank which equates to just 53.2mpg, a full 6% lower than the computer.
The previous fill up was a massive 8% under and every previous fill up has been out by between 4% and 8%.
Previous experience in numerous other cars including VW and BMW company cars suggests this is common however some people are claiming the system is accurate?
Any suggestions as to why mine is so far out? My average speed seems much higher than other people because most of my driving is on motorway. The computer did seem the most accurate when my average speed was lower. My tyres are running eco pressures. Dafny is the 1.4T 6 speed with 215/45R17 tyres.
Overall I'm still very impressed by her economy but I would like to know why the trip is so far out on Dafny when others reckon theirs is accurate.
However it took 29.93 litres of petrol to brim the tank which equates to just 53.2mpg, a full 6% lower than the computer.
The previous fill up was a massive 8% under and every previous fill up has been out by between 4% and 8%.
Previous experience in numerous other cars including VW and BMW company cars suggests this is common however some people are claiming the system is accurate?
Any suggestions as to why mine is so far out? My average speed seems much higher than other people because most of my driving is on motorway. The computer did seem the most accurate when my average speed was lower. My tyres are running eco pressures. Dafny is the 1.4T 6 speed with 215/45R17 tyres.
Overall I'm still very impressed by her economy but I would like to know why the trip is so far out on Dafny when others reckon theirs is accurate.