I have a Swift DLX 2015. I drive my car very gently and was getting 12-13km/l in city ever since I bought it.
Last month I got all the filters, oil and plugs changed(all genuine). 2 days after that I went to a mechanic(no authorized dealership was present nearby at that time), he cleaned the throttle body with some sort of spray and after that I came home.
Immediately after that the consumption has dramatically increased. It is now doing just 6-7km/l. The mechanic seemed to be a fraud and he even advised me to change the fuel injectors with those of Vitz and was selling the set in PKR 2000 but I rejected. He seemed to have done something wrong. I am not a geek with regards to cars so have no idea what possibly could have gone wrong. I went to 3S dealership, they checked everything and said its all ok, nothing wrong here.
So please advise me how I can get to the root of problem?
Thanks