5w30 vs 10w30 Oil – What is The Difference? Which is Better?


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Quick Answer: Difference between 5w30 and 10w30 Oil

5w30 10w30
Thinner at lower temperatures. Thicker at lower temperatures.
Lower Viscosity Higher viscosity
Works within the temperature range of -30 degrees Celsius to 35 degrees Celsius. Works within the temperature range of -18 degrees Celsius to 30 degrees Celsius.
Used by light duty petrol and diesel engines. Used by heavy load hauling engines.
Provides better cold weather starting. Provides better sealing action.

10w30 and 5w30 engine oil are examples of multi-grade oils. Multigrade Engine oil is a lubricating substance used for engines to reduce friction and increase engine lifetime.

Why Engine Oils?

Engine oil is a lubricating substance used in vehicle engines, particularly in internal combustion engines. Engine oil is also known as motor oil or engine lubricant. Engine oils are characterized by their viscosity.

Engines have lots of moving parts, which are subjected to lots of friction.

If unchecked, friction may cause wear and tear of engine parts.

Hence, lubricating substances like engine oil are necessary to be used in engines to reduce friction between different engine parts and increase engine life.

Engine oil is a good engine lubricant. It is made from base oils or base lubricating oils (like grease) and certain special additives.

These are very important for internal combustion engines.

Internal combustion engines are those engines which normally function by burning fuel within the engine body.

This fuel combustion is responsible for driving the engine which in turn will drive the vehicle.

The internal combustion engine will be subjected to very high temperatures, almost up to 600 degrees Celsius, as the fuel has to be burnt within the engine.

When a lubricant is under such conditions, its viscosity may change and this can affect the engine’s performance.

Viscosity is one of the key parameters that describes engine oil. Viscosity is the property of a fluid that determines how fast it flows.

Hence, the Society of Automotive Engineers (SAE) gives a particular numerical grade to oil based on its viscosity. Thicker oils have a higher grade and thinner oils have a smaller grade.

Engine oils may be a single grade or multi-grade oils. Single grade oil contains a single viscosity grade.

Multigrade engine oils

Multigrade oils contain two viscosity grades- one grade is for the viscosity at cold temperatures (denoted with “W” for winter) and another grade for the viscosity at higher temperatures. For example, 10w30 and 5w30 are multi-grade oils.

Confused about Engine oil codes, check this video for quick reference –

10w30 Engine Oil

10w30 multigrade engine oil has a viscosity grade 10 for lower temperatures and a viscosity grade 30 at higher temperatures.

10w30 oils have a viscosity grade of 10 at low temperatures and a viscosity grade of 30 at high temperatures. It has a low viscosity grade at lower temperatures which means the oil is thin at such temperatures.

Similarly, the oil is thicker at higher temperatures.

Key Specifications of 10w30

Some specifications to look for in 10w30 oils are API SN, ACEA rating and its viscosity grade.

API SN is an engine oil category introduced by the American Petroleum Institute that describes the oil to meet certain specifications.

The engine must be able to protect the engine’s piston from any deposit made by the fuel combustion. It must have better sludge control, that is, it does not result in forming any undesirable gels or sludge at higher temperatures.

The oil must be seal compatible and after treatment compatible.

The 10w30 engine oil meets the requirements of the API SN.

ACEA stands for the European Automobile Manufacturers Association. This organization is responsible for assigning ACEA oil sequences for different engine oil specifications.

A 10w30 engine oil must usually have an ACEA A3/B3 or A3/B4 rating.

Features and Benefits for 10w30

10w30 has many benefits and unique features.

It forms a continuous layer over all engine parts so that the friction between moving parts is reduced. They reduce wear and tear of the engine during the start/stop operation while also keeping the engine cool.

They also protect the engine parts from getting rusted. On the whole, 10w30 engine oil increases engine life.

A smooth clutch and gear operation can be obtained. Noiseless engine operation is thus possible.

It retains viscosity even when the temperature fluctuates over a wide range.

Lastly, this lubricant can be used in engines using advanced fuels like biodiesel or biofuel.

Uses of 10w30

10w30 engine oil can be used in most automotive petrol or diesel engines. Even though this engine oil can be used for starting the vehicle in cold weather, it is best suited for use in hot weather.

It is also mainly used in vehicles which are supposed to carry heavy loads or haul heavy luggage.

5w30 Engine Oil

5w30 multigrade engine oil has a viscosity grade of 5 at lower temperatures and a viscosity grade 30 at higher temperatures.

5w30 oils have a viscosity grade of 5 at low temperatures and a viscosity grade of 30 at high temperatures.

It has a low viscosity grade at lower temperatures which means the oil is thin at such temperatures.

Similarly, the oil is thicker at higher temperatures.

Key Specifications of 5w30

5w30 engine oil meets the API SN requirements and has an ACEA grade depending upon the oil brand.
5w30 also contains MB approval.

MB approval refers to Mercedes Benz specifications that assign a certain grade to the engine oil. The MB grade of 5w30 again depends upon the oil brand.

Moreover, 5w 3 also contains VW approval (Volkswagen oil specifications), Ford oil specifications and Porsche oil specifications.

Benefits and Features:

5w30 has many benefits and unique features.

It forms a continuous layer over all engine parts so that the friction between moving parts is reduced. They reduce wear and tear of the engine during the start/stop operation while also keeping the engine cool.

They also protect the engine parts from getting rusted. On the whole, it engine oil increases engine life.

They have superior thermal stability, that is, they maintain their properties even when the temperature varies wildly.

It also is designed in such a way that it minimises oil consumption as a very small amount of engine oil is sufficient lubricant for an engine.

Uses of 5w30

5w30 is used in light-duty diesel engines, light-duty petrol engines, and automotive gasoline engines. 5w30 engine oil is preferred for engines working in cold climates, as it gives good flow at lower temperatures.

difference between 5W30 VS 10W30 OIL

Difference between 10w30 and 5w30 Engine Oil

The main difference between 10w30 and 5w30 engine oil is their viscosity grades. 5w30 is less viscous than 10w30. 5w30 is also the thinner engine oil of the two at lower temperatures.

5w30 is, therefore, better suited for use in areas with lower temperatures like -30 degrees Celsius and at areas with relatively hotter climates where temperatures reach up to 35 degrees Celsius.

10w30 does works in a comparatively smaller temperature window, from -18 degrees Celsius to 30 degrees Celsius.

5w30 is used for light-duty engines while 10w30 is used for engines which carry heavier loads.

10w30 provides sealing action in the engine due to the fact that it is thicker than 5w30 engine oil.

5w30 10w30
Thinner at lower temperatures. Thicker at lower temperatures.
Lower Viscosity Higher viscosity
Works within the temperature range of -30 degrees Celsius to 35 degrees Celsius. Works within the temperature range of -18 degrees Celsius to 30 degrees Celsius.
Used by light duty petrol and diesel engines. Used by heavy load hauling engines.
Provides better cold weather starting. Provides better sealing action.

Summary

To sum it all up, engine oil is a lubricant used in engines so that it reduces friction between engine parts and thus increase engine lifetime. They are mainly characterized by their viscosity.

5w30 and 10w30 engine oils are multigrade oils.

5w30 engine oil is thinner than 10w30 engine oil. While 5w30 oil can be used for light duty engines in colder climates, 10w30 engine oil can be used in heavy load carrying engines and in hotter climates.

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