Aoa. I own a 1996 Toyota Corolla with a 1.6 EFi engine. The problem is my car does 8-8.5kmpl on petrol in city without AC. On CNG, it used to give me around 130-140km in a 50kg tank, which is acceptable.
I've heard people claiming 12-14kmpl on the same model Corolla. I clean the air filter on a weekly basis. The tyres have 30PSI of air in them. Engine oil is still in a good condition. In short, the car is mechanically fit. But this fuel economy issue is worrying. As summers are now approaching, im afraid my car would do 6-7kmpl with the A/C on. Any responses would be highly appreciated.