Ark Vision Energy Depot

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How engine oils are graded.

Oil is typically known to congeal or thicken when the engines' temperature is low and liquifies when the temperature is high. This is known as viscosity. Engine oil is therefore graded according to its viscosity. In the automotive industry, the grade of an oil is therefore denoted with the temperature degrees starting from the low to high.

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If you are reading this post it means you are wondering why engine oil is graded and why are the funny numbers for different engine oils such as 20W-50 and 15W-40. Don’t worry you are in the right place.

The numbers you are wondering about symbolize the temperature at which oil reacts to engine cooling and heating. For example 20W-50 means that the oil starts to thicken when the engines’ temperature gets to 20 degrees low and liquifies when it gets to 50 degrees high. 

This process of reaction to varying temperatures is called viscosity and it means a lot to your engine. As engine oil is used for lubrication of the parts that keep your vehicle in motion, it is important for you to know at which level is my engine oil liquified or congealed. The faster it gets liquified, the better.

remember, viscosity varies from fuel to fuel.

Frequently Asked Questions

Some of our clients have asked these useful questions and we hope this will assist you as well.

AVX Engine oil can be used on any machine that uses petrol or diesel. Yes you can use this lubricant for a petrol or diesel powered lawn mower.

if AVX Tech engine oil lubricant does not work as explained, you get your money back, 100%.

AVX Engine oil can be used on any machine that uses petrol or diesel. Yes you can use this lubricant for a petrol or diesel powered generator.