A fuel gauge on a General Electric locomotive tops off at 2,000 imperial gallons which equals about 2,400 US gallons. Diesel is the fuel of choice for these massive machines. On this day two color contrasting locomotives are joined together on a tracks in Clinton, Iowa, just feet from the Mississippi River. The blue color Dakota, Minnesota & Eastern (DME) engine, called the "City of Wall" was built in 1966 per railpictures.net. The red Canadian Pacific locomotive also travels the Midwest from the US to Canada according to that website's tracking of CP 3081.