Engine Oil: Functions and Types

Category: Other


Motor oil is a very essential component of the engine, they are like the heart and soul of it.

What is Engine Oil?

When used in internal combustion engines, engine oil is used to lubricate the interior components, guard against corrosion, and keep the engine cool.

What is Engine Oil Used For?

When it comes to engines, engine oil's primary purpose is to lubricate the moving parts. As a result of the oil, the engine components function smoothly and wear out less quickly. Heat is removed from lubricated engine components before the oil is cooled in the sump and then recirculated through the engine.By using your vehicle's engine oil system, which has the following components:

  • Oil sump: It’s the place where you store the oil

  • Oil galleries: Transport of oil via the engine's oil galleries

  • pump: This device is used to keep the oil flowing

  • Oil filter: Removes contaminants from the engine oil before it is poured into the engine

Additional chemical ingredients in motor oil increase its efficiency and help keep your engine clean by eliminating contaminants.

Motor Oil Additives Include

  • To prevent foam and bubbles from developing in the oil, use foam inhibitors

  • Protect against corrosion by producing a protective layer.

  • Improves oil flow in cold climates by adding antifreeze

  • Impurities on engine components can be prevented using dispersants and antioxidants.

  • Wear inhibitors for rapid lubrication when the engine is started.

  • Increasing oil viscosity index

  • Enhancers of the oil's viscosity index to increase performance at high temperatures

Function Of Engine Oil

1. Optimizes Engine Performance

Perfectly smooth metal surfaces are difficult to achieve, especially when it comes to moving components. Engine oil fills tiny gaps between the piston and cylinder to avoid leaks and loss of engine performance.

2. Prevents Corrosion:

A layer of oil creates a barrier between engine components, protecting them and preventing corrosion. Additives in modern engine oils work to chemically neutralize corrosion.

3. Keeps Engine Temperature Constant:

 Upon starting, an engine will get hot. Engine oil's role in removing this heat and transferring it elsewhere is one of its tasks. As a matter of fact, engine oil accounts for up to 40% of an engine's cooling system. As it runs across surfaces cooler than its typical 230 – 260F working temperature, it maintains temperatures. In the oil sump, or oil cooler if there is one installed, the heat disperses.

4. Lubricates the Engine

A thin, slippery coating is left on the surface of an engine as engine oil is poured into it. Reduces friction by reducing contact between engine parts. As a consequence, engine wear is reduced, and engine parts have a longer service life.

5. Removes Contaminants

During normal operation an engine releases a variety of by-products and impurities such as metal particles and soot deposits along with acidic dust and dirt that may cause havoc in the engine. These pollutants are suspended in the engine oil, which prevents them from coming into touch with engine components and causing harm. Dispersants, which are added to engine oil during manufacture, allow it to force suspension and preserve internal engine cleanliness, which is the reason for this phenomenon.

Engine Oil Viscosity

When it comes to engine oil viscosity, it is the ease with which oil flows at a certain temperature. Because they have a lower viscosity, thin oils are easier to pour at low temperatures than heavier oils. When it's chilly, thin oils minimize friction in engines and help them start more quickly. It is easier to maintain film strength and oil pressure with thick oils at high temperatures and loads.

Types of Engine Oil 

1. Full Synthetic Oil

The molecules in fully synthetic motor oil have been chemically designed to be uniform. Due to its few contaminants, it operates better than regular oil molecules. Fully synthetic oil offers a greater viscosity and superior corrosion and oxidation resistance than conventional oil. For high-performance engines or hauling trucks, it's the costliest type of oil available.

2. Semi Synthetic Oil

It is a hybrid; it has better resistance to oxidation and excellent low-temperature characteristics. Some prefer it over entirely synthetic oil because of the increased power it provides, while others prefer it because of the lower price tag it comes with.

3. High Mileage Oil 

Your vehicle may need to be serviced with "high mileage oil" if it has more than 75,000 miles on it. To preserve seals, prevent leakage, and minimize engine smoke and pollutants this type of oil contains special compounds.

4. Conventional Oil

The industry standard is conventional motor oil. It is made from refined crude oil and is available in a wide variety of viscosity grades, according to the manufacturer. When it comes to late-model automobiles that are driven on a daily basis, it is most commonly utilized.


It is very important that you choose the best car engine oil, there are a lot of factors that you should know before purchasing a bike engine oil. You need to be familiar with what engine oil does to your vehicle, how it functions, what types of engine oils are available in the market. After knowing all these things, you can make the correct purchase.