i was a regular customer of Garage Master but later realized that whenever they are unable to fix your problem, they tell you an expensive way out but in a diplomatic method like, 'you need this this this. we don't have but you can check from the market.' they do have an Enercon machine so that puts ones mind at a bit of ease though.
Mubarak CNG in G-10 is well known but they are sheer robbers. obviously the car runs fine but that is as long as you listen to their expensive and offensive suggestions 'you've to buy this 2 in 1 advancer + emulator for Rs. 6500 else this this this will happen. the one you're talking of for Rs. 2000, that is fake and chinese and will wear your tires off' whereas NOTHING happens and it only leads you to realize that our rulers aren't the only thieves in the country.
never ever go to f-10.
best is to go to a mechanic/workshop who've nothing to sell. you might like to call Basharat at 03005324699 and give my reference as Saqib. i had a Corolla and Platz and also took mohsin's City. just telling for further clarification. he works at the government's station in Blue Area.