Construction Bots can now refuel your trains. Open any station and configure the desired fuel and amount.

Stations with the same name, share the same configuration. If there are multiple stations with the name "Depot", you only have to set the fuel and amount once.

If you progress through the game and unlock more advanced fuel, you can tell your refueling station to remove any unwanted fuel to get new speed boni asap.
Make sure the logistic network has enough storage space, otherwise the removed fuel will spill on the ground.

Bug Reports or Requests are welcome and can be posted in the Mod Portal.