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Jet Fuel: Includes both naphtha–type and kerosene–type jet fuel.

Jet Fuel, Kerosene–Type: A kerosene–based product with a maximum distillation temperature of 400 degrees Fahrenheit at the 10–percent recovery point and a final maximum boiling point of 572 degrees Fahrenheit and meeting ASTM Specification D 1655 and Military Specifications MIL–T–5624P and MIL–T–83133D (Grades JP–5 and JP–8). It is used for commercial and military turbojet and turboprop aircraft engines.

Jet Fuel, Naphtha–Type: A fuel in the heavy naphtha boiling range having an average gravity of 52.8 degrees API, 20 to 90 percent distillation temperatures of 290 degrees to 470 degrees Fahrenheit, and meeting Military Specification MIL–T–5624L (Grade JP–4). It is used primarily for military turbojet and turboprop aircraft engines because it has a lower freeze point than other aviation fuels and meets engine requirements at high altitudes and speeds.

Jobber: A jobber of petroleum products is a person or company that purchases quantities of refined fuel from refining companies at the wholesale price at a terminal for sale to retailers. The jobber sometimes owns the gasoline being sold, and the station to which it is being sold. The jobber can be a marketer or distributor.

Jones Act: The Jones Act requires coastal shippers to use U.S.-built vessels and U.S. crew.

Joule: A unit of work or energy equal to the amount of work done when the point of application of force of one newton is displaced one meter in the direction of the force. It takes 1,055 joules to equal a British thermal unit. It takes about one million joules to make a pot of coffee.