Yes, this can be done in the Fuel Network Manager. Go to the menu option, FEATURES and select Fuel Network Manager. By doing this, the Fuel Network Manager's window will pop-up. In the 'Fuel Locations' box, type in a particular fuel stop. Once that has been completed, you may click on the 'Add' button or double-click the site in the box below, to add it to the fuel network. Now when a route has been calculated, it will include those fuel stops within the itinerary that were selected in Fuel Network Manager.