Yes 13-14 with A/c in Karachi's pathetic traffic
You can see my Cultus old posts in which I shared that my Cultus used to gave me 15.5 without A/c & 15 with A/c
Yes I personally felt Cultus engine infact all Suzuki engines are not fuel efficient & environmental friendly.
Toyota engines are highly fuel efficient, durable, low maintenance & environmental friendly.
Only you have to follow simple conditions like light food pedal, 5w30 engine oil, neat air filter with properly maintained & tuned Engine