A dramatic increase in crude-by-rail shipments over the past two years as well as surging lease rates for hard to come by tank cars encouraged an 18 month backlog of new orders – even while crude shipments only represent a small fraction of total rail carloads. Changes in the crude price differentials that encouraged the growth of crude by rail have reduced both the demand for tank cars and lease rates. Today we present analysis from PLG Consulting that shows rail tank car oversupply is quite possible - barring a few "wild cards".