This is my very first post and I'm hoping for good expert advise. Straight to the point, I have a 1988 charade with stock cb23 (most probably) engine. The problem is that the fuel consumption is very high, on petrol I'm getting around 7.5km per litre and a full cng (50kg) tank gives me around 100km. I almost drive 80-100km per day so it's getting a bit expensive for me. I don't know what the problem is. I've taken my car for tuning a lot of times but the problem still remains. If anyone could tell me what i could do to solve this problem, if there is something i could DIY or someone could recommend a good mechanic to me. I am from Karachi. Thank you.