As a crude oil owner operator, your primary responsibilities are to drive a large truck and haul oil between an oilfield and a destination like a depot, rail station, or refinery. In this role, you may test and sample the oil to verify its quality, help load and unload your truck, and transport additional paperwork to each destination. Owner operators have a significant amount of leeway in determining where, when, and how to transport materials, but most oil trips are relatively short jobs. It is usually cheaper to carry crude oil by train, so owner operators serve as the middlemen who get the oil to and from the train.