last night I watched a DVD of the SantaFe 3751 making a trip from LA to Chicago a number of years ago. This was right after it's complete restoration.
I think the trip was 2400 miles one way. What puzzled me was that on numerous stops along the way the tender was filled with water but never any mention of adding fuel oil. Was the tender large enough to have enough fuel oil to make it all the way to Chicago without any refueling