out of crude oil. While refining begins as simple distillation (by heating and separating), refiners
must use more sophisticated additional processes and equipment in order to produce the mix
of products that the market demands. Generally, this latter effort minimizes the production of
heavier, lower value products (for example, residual fuel oil, used to power large ocean-going
ships) in favor of middle distillates (jet fuel, kerosene, home heating oil and diesel fuel) and
lighter, higher value products (liquid petroleum gases (LPG), naphtha, and gasoline).













