TERMS

A base or process oil refined until its color, by

transmitted light, is straw to pale yellow.

Phenyl-Alpha-Naphthylamine, a commonly

used antioxidant

Product Approval Protocol Task Group

A homologous series of open-chain saturated

sometimes referred to as the methane series.

Passenger Car Motor Oil

Consistency, expressed as the distance in

millimeters that a standard needle or cone

penetrates vertically into a sample of the

material under known conditions of loading, time

and temperature.

Usually called normal pentane insolubles; the

insoluble matter which can be separated from

a solution of used lubricating oil in normal

pentane and, in addition to the benzene

insolubles, may include resinous bitumens

produced from the oxidation of oil and fuel

(ASTM Method C 893).

A lubricating oil additive which lowers the pour

point of an oil by reducing the tendency of the

wax to form a solid mass in the oil. Also called

pour-point depressor, pour depressant.

The lowest temperature at which oil will pour or

flow when it is chilled without disturbance under

definite conditions (ASTM Method D 97)

The ability of a pour depressed oil to maintain

its original ASTM pour point when subjected to

storage at low temperature approximating winter

conditions

The number of milliliters of precipitate formed

when 10 ml of lubricating oil is mixed with 90 ml

of petroleum naphtha and centrifuged under

definitely prescribed conditions. The precipitation

number should indicate the amount of the

asphaltic bodies dissolved in the lubricating oil,

although a certain amount of paraffin bodies

may separate with the asphaltic bodies (ASTM

method D 91).

An oil not used for lubrication but as a component

of another material, or as a carrier of other

products.