Hyundai Verna CRDI SX actual mileage on highway 14Km/Ltr

I purchased the Hyundai Verna CRDI SX one month back in August 2007 with a view and assurance given by the dealer for an average of 25Km/Ltr on highways & 20Km/Ltr in local. The company published ads in the news papers & other media claiming the average to be 32.8Km/Ltr under ideal conditions & that convinced me the average told by the dealer to be correct . After driving the car even after 2000Km and regular check up with the dealer  I am able to get a mileage of  max. 14Km/Ltr on highways & 10Km/Ltr in the local. I would not recomend this car to anyone if you are impressed by thr company claimed mileage of 32.8Km/Ltr. It is recommended to take a test drive and check the mileage personally before purchasing.