Server
Here you'll find all server functions
How to set/get fuel?
With Statebags is possible to get the fuel level value also from server with a different process, let's retrieve the vehicle server entity
local vehicle = NetToVeh(netId)
Then you need to set the statebag for get/set the fuel
-- previous locals to get the vehicle entity
Entity(vehicle).state.fuel
Now you can get or set the value of the Statebag in this ways
local vehicle = NetToVeh(netId)
local fuel = Entity(vehicle).state.fuel
local vehicle = NetToVeh(netId)
Entity(vehicle).state.fuel = 100