Bro e.g. I am using a 1.5VVT M15A. I randomly checked my fuel average once, it was around 7kmpl (my habit is whenever I am sitting outside waiting for someone, I constantly use my AC (was having chinese refrigerant/ gas at that time).
Then, I just changed the Ignition coils (previous had spark leakages or small holes in rubber boots/cables) , as well as cleaned throttle, genuine simple plugs (i think recommended iridium IFR6J11 [very costly, didn't install but bought for 12,000Rs.] will give even better average), air pressure 32-33 185/65R15, Genuine american refrigerant (i cannot feel any AC load now on genuine compressor, before I felt significant AC load), I am always using Shell 10w40. Now average with FULL blasting ac every time and heavy foot went up to 10,10.5Km/L easily.
Also now planning for m18A vvt swap with automatic transmission for SX4 suzuki. lets see
