I am having cultus 2010 EFI. there is an issue regarding fuel average. It is giving 6 to 7 km/ liter in city and 12 km/liter on highway. I got all things checked like spark plugs, fuel pump, fuel filter and everything else. My car have running of 53,000 and runs fine without any problem. I got injectors cleaned, throttle body clean and timing setting fixed but still no improvement in fuel average, can anybody help please.