HK1837 wrote:You've probably added near to 400kg to it, and standard as autos they do maybe 11-12L/100 at best around town. My mate's 2011 averaged 11.9L/100 when it was dead standard.
i also have a dead standard auto, but i get fairly decent mileage from mine...on average i get between 10.5km/l - 11.5km/l which converts to somewhere around 9.5l/100km to 8.7l/100km...i do the calculation every time i top up at the diesel pump. This includes town, traffic and highway driving (mostly 80km/h). However, i'll add that i do try to be as smooth/economical a driver as i can be most times and i'm from a small Caribbean island so my traffic jams and highway drivings may be comparatively shorter than what you all are used to.
with all the extra weight your fuel consumption has expectedly increased, but it does seem a bit high nonetheless. Best to get a scan/diagnostic as suggested above to see if anything shows ups and probably the maf and egr/intake system clean to help with any soot build up