As we know fuel is a non renewable resource and would take very long time to restore hence we should conserve fuel.

Here are some ways to conserve fuel :
1)Maximize use of public transport.
2)Only fill fuel in your car when it’s very low. 
3)Turn off your car in slow traffic and when you wait at traffic signals.
4)Use electric powered cars
5)Spread awareness among friends and family.

Hope this helps :D