CSX currently has an ad running in which it claims to be able to move 1 ton of freight 423 miles on 1 gallon of fuel. Now I wasn't exactly a math major, so I'm wondering if anybody knows how they arrived at this figure. I'm aware of ton miles, but would that claim include all phases of running, or just once the train is up to speed, or what? Also, it would seem the claim must be based on a certain rate of fuel consumption, so which type of locomotive(s) pulling how many tons at what speed, etc.? Get out your slide rules :lol: and gimme some help here, folks!