In Moon Karts, if you think you'll just race without worrying about fuel, you need to review your calculations. Fuel is essential here. Without it, there's no racing, no simple movement with the kart, and you also won't get all the rewards during the game. But don't worry, the solution is here: trade fuel with other players.
The game allows you to transfer fuel from one account to another. This is done via a button called "Transfer Fuel," located above the Shop button in the lower left corner of the screen. Once you click it, you can enter the amount of fuel you want to transfer and the Hive ID of the person you're sending it to in the game and give him some fuel to race with you.
But keep in mind that direct trading in the game isn't 100% enabled yet as most people said however, there is a practical alternative as you can buy or sell fuel through the game's Discord group where you can receive Script Coins for each fuel unit. You can then collect fuel and play freely, or by stake some cards.
The advantage of fuel trading is that it keeps you ready for the race, especially if you suddenly run out and don't have time to wait for another fuel supply. Also, if you have extra fuel so you can sell it to earn some Script Coins that can help you upgrade your kart or buy other items from the store.
Whether you're buying or selling, you need to be aware of how to trade fuel in Moon Karts to stay on the race track without stopping and get more rewards as I have said and to be on top of leaderboard and this is in advance gives you more rewards but at the end of the season.