The other evening we went to the Centralia Illinois station so a friend could see the new little building they had replaced the old one with. While there we decided to stay and see the 8:10 or so Saulki come though. It ran about a half hour late going towards carbondale. When it pulled in they had it with an engine on the rear, which looked rather odd to me. A fellow who is volunteering to watch the station said that the other two chicago runs have only a front engine and after emptying at carbondale back up a half mile or so and turn the train on a "Y". The odd thing about the train with an engine on both ends is that its the train that stays overnight so time is surely no reason to do that? Ever since I saw it made me wonder about the cost of hauling a heavy engine, the waste of an engine and if there was some benefit I haven't figured out to not turning this train. Especially in light of the fact that it actually has over night to do so?