Swift VDI After A Year

 I own a Swift VDI and have clocked 17000 kms and been a year since I got the car. The car was picked up from ABT Maruti in Chennai (the service sucks big time). I ‘ve had black emissions from the beginning throughout my ride esp. on throttle, till date there has been nothing done about it. No one ever tried to address the issue in service. My mileage was superb in the beginning 17.5 kmpl in city with the AC on, all of a sudden the mileage dipped at 14000 kms to 13.5-14 kmpl. Suddenly all the people who told me that the standard mileage in city is 18 kmpl seemed to have changed statements quoting “the stability of mileage will be known only 10000 kms and 14-13.5 kmpl is a very good mileage". I never understood how this could change all of a sudden, this has never happened to my previous cars, (I have owned over cars 15 cars over the years). I feel the hype around the waiting period is just to say that Maruti is overselling the product and a selling gimmick. I have gone in for my new car the Hyundai Verna CRDI.  I had d’zire as an option until I went back in time to all what I had gone through with Maruti. The service and the car with Hyundai is simply Awesome, Since Hyundai is going to be concentrating on the low cost diesel mid size and sedan (they have learnt after pricing the Getz a bit higher) they are going to be ruling the car market soon in the diesel segment. I am sure will not go in to ABT Maruti again. MARUTI Guys if you are listening monopoly period is over. Look at the players entering the market (can you believe off late even Honda is offering discounts), concentrate on your customers for retention. I don’t understand that when there is completion in the market how come Maruti is sitting back. Is it because they are taking people for granted?