Your car’s engine is its heart & engine oil is the blood.

Engine oil is responsible for the smooth functioning of the engine while performing critical functions such as reducing friction, cooling the engine components, & serving as the protection for the moving parts.

So it is clear how important it is to keep changing your car’s engine oil regularly.

What is engine oil made of?

Engine oil is typically made up of a combination of base oil & additives mostly in a ratio of 80/20. The additives include anti oxidisers, anti-wear chemicals, and dispersants which helps keep engine parts clean & smooth.

The Science of Engine Oil Grades

Whenever you change your car’s engine oil you would see something written in [xW-yy] format such as 15W40, 0W40, 15W30 etc.

Well this is what defines the quality or grade of the engine oil you are using in your car.

The Society of Automotive Engineers (SAE) has developed a scale to rate the viscosity of engine oils.

Let’s take an example of 15W40 grade engine oil:

Here W stands for the winter,

15 stands for oil’s flow at 0 degrees Fahrenheit (-17.8 degrees Celsius).  So lower the number less it will thicken in cold.

The number after W represents the oil’s viscosity measured at 212 degrees Fahrenheit (100 degrees Celsius). This number represents the oil’s resistance to thinning at high temperatures.

The Society of Automotive Engineers (SAE) has developed a scale to rate the viscosity of engine oils.

Let’s take an example of 15W40 grade engine oil:

Here W stands for the winter,

15 stands for oil’s flow at 0 degrees Fahrenheit (-17.8 degrees Celsius).  So lower the number less it will thicken in cold.

The number after W represents the oil’s viscosity measured at 212 degrees Fahrenheit (100 degrees Celsius). This number represents the oil’s resistance to thinning at high temperatures.

Types of Engine Oils

Remember we told you above that an engine oil is combination of base oil & additives. The base oil can be of either mineral, synthetic or a mixture of both known as semi-synthetic.

Now you must be thinking what exactly mineral, synthetic or semi-synthetic oils are?

Mineral Oil

Mineral oil is made from naturally occurring crude oil which is refined & processed to remove any kind of impurities. The viscosity of mineral oil is more as compared to synthetic or semi-synthetic oils. Mineral oil is mostly used for small cars. Problem with mineral oil is that they offer lesser lubrication as compared to others & does not perform well on high or extreme low temperatures.

Example of mineral oil are 15W40, 20W50

Synthetic Oil

Synthetic oil are the advanced & improved form of engine oils to meet the demands of modern engine cars. Molecules of synthetic oils are more uniform in shape with fewer impurities as compared to mineral oil.

They perform much better in extreme high or low temperatures. The result is superior engine protection. More stability & endurance hence the oil lasts longer & needs to be changed less frequently.

Some common grades of synthetic oils are 0W40, 0W20

 Semi-synthetic Oil

Semi-synthetic oils are a mixture of both mineral oil & semi synthetic oils. They provide better performance, protection and fuel economy than mineral oils, but not as good as a full synthetic

Example of semi-synthetic oils are 10W40, 15W40, 5W30.

So the question comes which is the right engine oil for your car?

Well the most common & obvious answer is always stick to the engine oil your car manufacturer has specified in owner’s manual & ask your service mechanic to use the same. 

In case your car’s service is due then you can always contact Gaadizo. We use OEM recommended spare parts & car manufacturer’s recommended engine oils.

Call/whatsapp @ 8388885555

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