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Page Title: TABLE 2-2. LUBRICANT ADDITIVES
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NAVAIR 17-15-50.4
TM 38-301-4
T.O. 33-1-37-4
CGTO 33-1-37-4
NOTE
Commercially available automotive oil additives should not be used as supplements for
military specification oils since the additives may be incompatible and may result in a
partial or complete loss of vital oil characteristics. Problems such as increased pour
points, foaming tendencies, bearing wear, engine corrosion, and piston ring deposits
have been identified with additive misapplications, which have resulted in equipment
malfunction and damage.
(2)  Each type of lubricant is formulated to meet a specific function and set of operating conditions.
The quality of the lubricant basestock and the intended application will dictate the need for a particular additive
type. Table 2-2 lists the various types of additives, which may be used, corresponding chemical compound types
and those chemical elements detectable by spectrometric analysis. Since numerous chemical compounds may
be used within each additive class, only general descriptions of additive compositions can be given. In many
cases, determination of the presence or absence of a specific additive can only be made through chemical
analysis. This is especially true if the additive is an organic compound and contains no unique chemical elements
other than the more common elements of carbon, hydrogen, oxygen, and nitrogen.
NOTE
Lubricant manufactures frequently use additives, which may be misinterpreted as
wear-metals during spectrometric analysis. An example of this is the use of copper as
and anti-oxidant.
TABLE 2-2. LUBRICANT ADDITIVES
Elements Detectable By
Additive Type
Chemical Type
Spectrometric Analysis
Antioxidant
Organic
None
Metallo-organic
Zn, Cu
Detergent
Metallo-organic
B, Ba, Mg, Na
Dispersant
Organic
None
Load-carrying
Organic
None
Metallo-organic
Zn
Corrosion inhibitor
Organic
None
Metallo-organic
Zn
VI improver
Organic
None
Anti-foam
Organic-silicone
Si
Pour point depressant
Organic
None

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