Question

An empty fuel tank of a car was filled with ordinary type of petrol

Answer 1

Then the car will get start and yu can travel easily from 1 place to another.

Answer 2

If you fill ordinary petrol or fuel in a sports car the car won't work but if you fill the same fuel in the economy cars it would help you to go more far from the sports car . In the end it depends on what type of car and fuel you are using.    Hope it helps :)