of any fluid can be described as its resistance to flow. Informally,
viscosity correlates with the thickness of a liquid substance. For
example: Thickness and resistance to follow of honey is relatively
higher than water, which denotes that the viscosity of honey is
greater than water. Fluidity is inversely related with viscosity that
means if the viscosity of a fluid is higher than its fluidity will be
is a Lubricant?
generally is a liquid substance, which is used to reduce friction
between surfaces. Based on the applications and the expected outcomes
lubricant can be of different types like engine oil, transmission oil
etc. A lubricant is made of two basic components: a. Base Oil b.
Performance Additives Based on the advancement in technologies, high
performance lubricant demands are increasing.
is a Multi-grade Lubricant?
oil's viscosity is defined by a numerical number, as decided by SAE
(Society of Automotive Engineers) for motor oils. This numerical code
system defines grade of a motor oil based on its viscosity
characteristics. For example: 30 or 40.
general, there are two types of motor oils or lubricants available.
Lubricants: Viscosity grade consist of only 1 number like 30 or 40
Lubricants: Viscosity grade consists of two numbers 10W-30. 10W
refers to the low-temperature viscosity ("Winter" in short "W"),
40 refers to the high-temperature viscosity.
most of the automotive lubricants are multi-grade oils, capable to
operate in wide temperate ranges.
is a Synthetic Lubricant?
oils are made with chemical compounds that are artificially
manufactured. Generally, for automobile applications, lubricants are
made with mineral base oils, which are derived from crude oil through
distillation process. However, the quality of based oils can be
further improved through advanced refining process. This produces
high quality base oils which contain less impurity, less sulphur
contents and have better viscosity index.
can be segregated into 3 broad categories based on the kind of base
oils and additives used:
Manufactured with Group I & Group II base oils.
Synthetic: Mineral oil with some proportion and benefits of
Synthetic: Developed with purest form of base oil like Group III and
above. Appropriate additives are also added in Semi Synthetic and
Fully synthetic oil to improve performance.
are the benefits of Synthetic Oil over Mineral Oils?
oils are manufactured with better quality base oils which have less
impurities. The molecules of synthetic oils are more uniformed which
helps the oil to perform more uniformly and efficiently.
oils are generally designed to cope with extreme situation of modern
engines and they come with loads of benefits:
protection from mechanical wear
lubrication even in low temperature
to thermal break-down
efficiency & fuel economy
oil degradation and many more
are the functions of Engine Oil?
oil's primary job is to provide lubricity to reduce friction
between metal parts. However, this is not all, it also needs to do
many other important jobs also like cleaning of engine parts,
cooling, reduce oxidation and foaming, protection from mechanical
wear and many more.
Engine Oil turns black?
of the important functions of engine oil is "Cleaning". During
operation, a lot of by-products and impurities are generated inside
the engine like soot, dirt and other combustion contaminants. Engine
oil's continuous & repeated exposure to heat cycles and
oxidation also result into darkening of engine oil over a period of
time. To keep engine protected, engine oils are developed with
detergent additives, which continuously keeps these impurities in
dispersed & suspended conditions so that during oil change all
these dirt particles come out easily.