Started off as my first script, and for whatever reason, I decided to release it. As it was pretty badly created, I felt like I should rewrite it and make a better version, so ended up spending a few hours doing so.

1. Download the latest version in the "code" tab on GitHub.
2. Drag & drop the folder into your resources server folder.
3. Configure the config file to your liking.
4. Add start LegacyFuel to your server config.

There are currently two (client-sided) exports available, which should help you control the fuel level for vehicles whenever needed.

SetFuel(vehicle --[[ Vehicle ]], value --[[ Number: (0-100) ]])
GetFuel(vehicle --[[ Vehicle ]]) -- Returns the vehicle's fuel level.

Example usage:

function SpawnVehicle(modelHash)
    local vehicle = CreateVehicle(modelHash, coords.x, coords.y, coords.z, true, false)

    exports["LegacyFuel"]:SetFuel(vehicle, 100)
end

function StoreVehicleInGarage(vehicle)
    local plate = GetVehicleNumberPlateText(vehicle)
    local fuelLevel = exports["LegacyFuel"]:GetFuel(vehicle)

    TriggerServerEvent('vehiclesStored', plate, fuelLevel)
end