The fuel tank capacity of Maruti Suzuki Celerio is 35 Liters. The mileage is as follows:
Petrol - 21.63 km/l
Petrol (AGS) - 21.63 km/l
CNG - 31.76 km/ kg.
The fuel efficiency of the car is good and it performs well on all kinds of terrains. On full tank, you could cover about 585-600km considering the fact that the car would need fuel for other functions and would also consume more fuel while accelerating or on steeper terrains.