How do engine oil grades work?
Hi, My name is David.
And in this video I will tell you all about what these grades mean and what is important.
Engine oil grades or oil viscosity grades...
are the combination of letters and numbers you find on every bottle of oil.
They are used to communicate oil thickness at high and low temperatures.
If you want to know how and why these are used...
keep on watching.
It's probably an all too familiar situation.
You're on the lookout for new engine oil, online or in a store.
Wondering what kind is right for you...
Castrol EDGE, MAGNATEC 10W-40...
Castrol GTX Ultra Clean, Power 1 and more importantly...
what kind is right for your engine?
There are so many types of engine oil.
and every bottle presents you with the same challenge.
These little digits number W number. What do these numbers mean?
It's quite simple actually.
The number before the W which stands for winter...
indicates the viscosity at low temperature.
For example before you start your engine.
The number mentioned right after the W...
stands for viscosity at 100 degrees celsius...
which is near...
the normal operating temperature of your engine.
First let me tell you about the origin of the grades.
According to Automotive Engineers.
All oils have a resistance to flow...
which should be taken into consideration when measuring performance.
This resistance to flow has been assigned with a number by the Society of Automotive engineers.
Commonly known as the SAE.
We call this number the oil viscosity grade.
But because this resistance to flow, the oil grade of any liquid...
differs at any given temperature the SAE decided to measure...
the grade at 100 degrees celsius.
Roughly the standard operating temperature of an engine.
Ok, so much for oil at standard operating temperature.
When starting the engine, the temperature of oil is much lower...
especially in winter.
This is why there is also a grade for low temperatures.
Basically, oil grades show you how the oil runs through your...
...engine when it is hot or cold.
So there are two grades in multigrade oil...
because of the variation in operating temperature.
One for when the engine runs hot and one for when it's cold.
With this knowledge it still can be a little bit confusing which engine oil...
is right for you and it is, because knowing the viscosity grades is one part.
The other part is knowing what oil your engine needs.
And this is where OEM approved lubricants come in.
OEM stand for Original Equipment Manufacturer..
and OEM lubricants are lubricants...
made by or for a manufacturer.
So OEM approved means...
approved by the manufacturer.
In other words...
please refer to your car owners manual as a manufacturer of your...
engine definitely knows which products you should or shouldn't use...
and at the end of this video. I've got a great suggestion.
It's a tool that you will find very useful.
Now there are many different engines and engine manufacturers...
and Castrol offers a wide range of engine oils and fluids.
There are engine oils for car engines, motorcycle engine oil...
both two and four stroke and transmission fluids...
such as automatic ATF and manual MTF.
So tell me which engine oil are you using and for which car or...
motorcycle type, do you use it specifically?
Let us know in the comments.
Most common of all oils are the 10W-40 engine oils...
offered in synthetic and part synthetic options.
Castrol MAGNATEC 10W-40 has a viscosity grade of ten when cold...
and forty at a hundred degrees celsius.
Near the operating temperature.
It has DUALOCK molecules that cling to critical engine parts...
and lock together to form a powerful force-field of protection...
reducing warm-up and stop-start wear by up to 50%.
And showing better performance of your engine in many circumstances.
Today's engines are smaller and more efficient without sacrificing performance.
These advances in engine design mean increased pressure...
and the need for oils to be stronger than ever before.
Castrol EDGE is Castrol's most advanced range of engine oils.
EDGE with Fluid TITANIUM Technology, physically transforms its structure...
becoming stiffer at points of extreme pressure.
Keeping metal apart and reducing friction...
stronger under pressure
It reduces performance-robbing friction by up to 20%.
Know that you have all the right knowledge to make your choice...
find out which engine oil is best for your engine by using the Castrol Oil Finder.
You simply enter details like car type, engine...
and it tells you everything you need to know.
Check out the I-Card in the top right corner.
You can also check your owners manual for your car.
To find out which engine oil is right for your vehicle.
Ok, that's it for now.
My job is done.
And if you want to know more about car or motorcycle engine oils and lubricants...
Check the Castrol.com website in the description below.
We've got plenty more helpful videos coming your way.
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Or have a look at one of our other videos.
Thanks for watching and see you next time.