Glossary
Terms & Glossaries of Shipping and Trading
HFO (Heavy fuel oil)
Heavy Fuel Oil is a fraction obtained from petroleum distillation, either as a distillate or a residue. The term fuel oil is used to refer only to the heaviest commercial fuel that can be obtained from crude oil; heavier than gasoline and naphtha. Marine diesel oil contains some heavy fuel oil, unlike regular diesels. Also, marine fuel oils sometimes contain waste products such as used motor oil.
