The weight in milligrams of base (alkali) needed to neutralize the acidic material in one gram of oil. The higher the neutralization number, the more acidic the oil is.

Obtained by multiplying the API gravity by the aniline point (the temperature at which a chemical called aniline and diesel mix) of a Diesel fuel, divided by 100. It indicates the quality of the fuel.

The American Petroleum Institute (API) is a United States trade association that represents 400 corporations in the petroleum industry.

A closed-cup flash tester. Used to test the flash point of kerosene and other distillates.

The pH of an oil, which may or may not influence the behavior of the oil, depending on the exact mechanism of by which the pH is achieved.

The ratio of air consumed to fuel consumed, by weight, in an internal combustion engine or other fuel-burning apparatus. Has impact on performance and efficiency.

Any hydrocarbon in chains. Includes the alkanes, alkenes, and alkynes among many others.

The largest class of hydrocarbons. These include linear and branched chain molecules typically used in the production of fuel.

Invented in 1952, these are often referred to as “Hydrils.” These blowout preventers use a rubber seals to close around the drill string and seal the well.

The standard by which all crude oils are measured. API gravity is used to determine the specific gravity of crude oil and thus its density. Lighter crudes are more valuable because they are more easil [..]