All about car engine oil.

1
All about Car Engine Oil
2
What is Car engine oil?

• Motor oil, engine oil, or engine lubricating
  substance is any of assorted substances
  comprising base oils increased with additives,
  significantly antiwear additive and detergents,
  dispersants and, for multi-grade oils viscousness
  index improvers. additionally thereto, most
  lubricating oils contain corrosion (GB rust) and
  oxidisation inhibitors. oil is employed for
  lubrication of burning engines. the most operate
  of oil is to cut back friction and wane moving
  elements and to wash the engine from sludge (one
  of the functions of dispersants) and polish
  (detergents). It conjointly neutralizes acids
  that originate from fuel and from oxidisation of
  the lubricating substance (detergents), improves
  protection of piston rings, and cools the engine
  by carrying heat off from moving elements.

3

• Motor oil may be a stuff utilized
  in combustion engines, that power cars,
  motorcycles, lawnmowers, engine-generators, and
  lots of alternative machines. In engines,
  there are elements that move against one
  another, and therefore the friction wastes
  otherwise helpful power by changing the K.E. to
  heat. It conjointly wears away those elements, tha
  t may lead to lower potency and degradation of
  the engine. This will increase fuel consumption,
  decreases power output, and might result
  in breakdown.

4
Properties of engine oil.

• Most motor oils area unit made up of a heavier,
  thicker fossil oil organic compound base stock
  derived from fossil oil, with additives to boost
  sure properties. the majority of a typical gas
  consists of hydrocarbons with between eighteen
  and thirty four carbon atoms per molecule. one
  among the foremost necessary properties of gas in
  maintaining a lubricating film between moving
  components is its consistency.

5

• The consistency of a liquid are often thought of
  as its "thickness" or a live of its resistance to
  flow. The consistency should be high enough to
  take care of a lubricating film, however low
  enough that the oil will flow round the engine
  components beneath all conditions. Fuel Injection
  Engine Management consistency index could be a
  live of what quantity the oil's consistency
  changes as temperature changes. a better
  consistency index indicates the consistency
  changes less with temperature than a lower
  consistency index.

6
Grades of engine oil

• The Society of Automotive Engineers (SAE) has
  established a numerical code system for grading
  motor oils in step with their consistence
  characteristics. the first consistence grades
  were all mono-grades e.g. a typical engine oil
  was a SAE thirty. this can be as a result of as
  all oils skinny once heated, therefore to urge
  the correct film thickness at in operation
  temperatures oil makers required to start out
  with a thick oil to attain this. This meant in
  weather it'd be troublesome to start out the
  engines because the oil was too thick to crank.
  However, as oil additive technology was
  introduced that allowed oils to travel less
  skinny as quick (i.e. a better consistence
  index), this allowed choice of a agent oil to
  start out with e.g. a product that acts like AN
  SAE fifteen at cold temperatures e.g. 15W (W for
  winter) and also the finish half its performance
  at 100C

7
Single-grade

• A single-grade engine oil, as outlined by SAE
  J300, cannot use a compound consistency Index
  Improver (also observed as consistency Modifier
  or VII) additive. SAE J300 has established eleven
  consistency grades, of that six area unit thought
  of Winter-grades and given a W designation. The
  eleven consistency grades area unit 0W, 5W, 10W,
  15W, 20W, 25W, 20, 30, 40, 50, and 60. These
  numbers area unit usually observed because the
  "weight" of a oil, and single-grade motor oils
  area unit usually referred to as
  "straight-weight" oils.

8
Multi-grade

• The temperature vary the oil is exposed to in
  most vehicles will be wide, starting from cold
  temperatures within the winter before the vehicle
  is started up, to hot operational temperatures
  once the vehicle is absolutely warm up in hot
  summer weather. a particular oil can have high
  consistency once cold and a lower consistency at
  the engine's operational temperature. The
  distinction in viscosities for many single-grade
  oil is simply too giant between the extremes of
  temperature. To bring the distinction in
  viscosities nearer along, special compound
  additives known as consistency index improvers,
  or VIIs square measure more to the oil. These
  additives square measure accustomed build the oil
  a multi-grade oil, tho' it's potential to own a
  multi-grade oil while not the utilization of
  VIIs. the concept is to cause the multi-grade oil
  to own the consistency of the bottom grade once
  cold and therefore the consistency of the second
  grade once hot. this permits one sort of oil to
  be used all year. In fact, once multi-grades were
  at first developed, they were often delineated as
  all-season oil. The consistency of a multi-grade
  oil still varies logarithmically with
  temperature, however the slope representing the
  modification is lessened. clarification needed
  This slope representing the modification with
  temperature depends on the character and quantity
  of the additives to the bottom oil.

9

• We hope you like our presentation on Car Engine
  Oil. We always should take car of engine by
  changing engine oil time to time or in every
  service.