When you receive a gift of fuel in Farmtown, you can access it from your gift box. After accepting the gift, you can replenish your fuel at the fuel station.
Many of the farming tools in Farmtown require fuel, such as the harvester, seeder, combines, fishing boats and many others. When running low on fuel, you can request the gift from your friends. After accepting the gift from your gift box, click on the map icon to go to the fuel station. There, you can select the option to refuel. The game automatically replenishes your fuel based on factors such as your game level and the number of friends and neighbors you have. You can also make your own fuel by placing an oil pump and a refinery on your farm.