Did you know...
Only the American Petroleum Institute (API) Service SA motor oils have no
additives, and they are therefore incapable of protecting modern engines
are used as friction modifiers include
Graphite, Molybdenum disulfide, Boron
nitride (BN),Tungsten disulfide (WS2)
and Polytetrafluoroethylene (PTFE).
Extreme pressure additives or EP additives are additives used in the formulation of gear oils whose role is to decrease
wear of the parts of the gears exposed
to very high pressures. They are also
added to cutting fluids for machining of
metals.
Antiwear additives or wear inhibiting
additives cause a film to surround metal
parts, helping to keep them separated.
These anti-wear additives primarily act
as friction reducers that prevent metalto-metal contact. Zinc dialkyldithiophosphate (ZDDP) is a popular antiwear
additive.
IV) For contaminant control
Dispersants are additives that keep
contaminants (e.g. soot) suspended
in the oil to prevent them from
coagulating. Dispersants keep the
foreign particles present in a lubricant
in a dispersed form (finely divided and
uniformly dispersed throughout the oil)
and by so doing prevent these particles
from blocking oil passageways in the
engine.
Defoamer or an anti-foaming agents
are chemical additives that reduce and
hinder the formation of air bubbles
and foam in lubricants. Air bubbles
and foam in the oil can cause a loss
of lubrication, pitting, and corrosion
where entrained air contacts metal
surfaces.
.
viscous enough to lubricate at operating
temperature. Viscosity improvers are
widely used in multigrade oils, viscosity
of which is specified at both high and
low temperature. Most multi-grade
oils have viscosity modifiers. Some
synthetic oils are engineered to meet
multi-grade specifications without
them. Viscosity of oils sharply decreases
at high temperatures. Low viscosity
causes decrease o