Which Grade Motor Oil Should I Use?

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Trying to figure out the difference between 5w20 and 5w30 vegetable oil ?
here ’ s the problem :

There are a count of automotive forums that have started rumors about the quality of 5w20 motor oil. possibly you ’ ve already discovered these pathetic threads .
I ’ thousand think that you like to think for yourself and want another opinion .
If you ’ rhenium looking for real information about which vegetable oil is best for your car, 5w20 v 5w30, you are in the veracious place .
In this article we will break down what the numbers on the bottle of oil entail, whether your petroleum will improve your flatulence mileage and which matchless is best for your cable car .
See also: 5w30 volt 10w30

5w20 vs 5w30: What Do the Numbers Mean?

Motor anoint is classified by its viscosity. Simply put, viscosity measures the vegetable oil ’ randomness resistance to flow. Or you could think of viscosity as the thickness of the anoint .
The higher the count on the bottle the thick the anoint is .
For example, molasses has a high viscosity and water has a very first gear viscosity .
When comparing diverse grades of motor vegetable oil, it is helpful to know what each of the numbers on the bottle means .
Let ’ s startle with 5w30 as it is the most common grade of anoint .
today most oils available at your local car parts storehouse are multigrade formulas. That means their viscosity is designed to change depending on the temperature .
The first count, 5W, represents the cold weather viscosity rating of the oil at 0 degrees Celsius, with “ W ” standing for winter .
When we start our car on a cold winter day, we want the anoint to be very thin so it can immediately lubricate the inner parts .
however, as we start driving and our engine reaches normal operating temperature, we want the petroleum to thicken up to better protect our engine .
At convention operating temperature, a one mark oil with a viscosity military rank of 5 would be excessively thin to protect our locomotive. That ’ second why we use a multigrade anoint like 5w30 .
Based on what I ’ ve told you about viscosity so far, I bet you can start to guess the difference between 5w20 and 5w30.

If you guessed that 5w30 is thicker than 5w20 at convention operating temperature, you ’ d be right .
so why do some vehicle manufacturers recommend an vegetable oil with a lower viscosity like 5w20 preferably than 5w30 ? Keep read to find out below .

Mobil 1 5W-20 Synthetic
Mobil 1 5W-30 Synthetic

SAE Grade

Viscosity @ 100ºC (212ºF)

Viscosity, @ 40ºC (104ºF)

Viscosity Index

Sulfated Ash, wt%

HTHS Viscosity, mPa•s @ 150ºC

Pour Point, ºC

Flash Point, ºC

source :
hypertext transfer protocol : //www.mobil.com/English-US/Passenger-Vehicle-Lube/pds/GLXXMobil-1-5W20
hypertext transfer protocol : //www.mobil.com/English-US/Passenger-Vehicle-Lube/pds/GLXXMobil-1-5W30

5w20 vs 5w30: Which One Provides Better Gas Mileage?

A lower viscosity oil like 5w20 will provide a thinner barrier of protective covering at the normal operate temperature of your engine .
Since there is less oil in between the moving parts of the engine, it will provide less friction and therefore better performance .
This better performance caused by using a lower viscosity motor vegetable oil normally improves fuel efficiency .
You may not notice a huge derail in your MPG, but there will be a flimsy improvement .
Remember, earlier when I said there were absurd rumors flying around about 5w20 oil ?
well, many automotive forums like to think that the better fuel efficiency comes at a cost. In fact, many say that using 5w20 alternatively of 5w30 can cause damage to your engine, resulting in a boil down engine life .
Yes, a lower viscosity oil like 5w20 will provide less security than 5w30 in normal operate conditions .
however, a lower viscosity oil is better in areas of the nation with lower modal temperatures and below freezing conditions .
Editor’s Note: You should always use the oil recommended by the vehicle manufacturer.
Related Article: AMSOIL five Royal Purple vs Mobil 1


If you are still trying to decide between 5w20 and 5w30 for your vehicle, I recommend that you look in your owner ’ mho manual of arms inaugural .
This will help keep your engine running potent for years to come and avoid any dearly-won repairs .
As I tried to illustrate in this article, there is alone a rebuff dispute between the two viscosities of anoint.

5w30 is by far the most common on the market. however, the lower viscosity interpretation, 5w20, is besides recommended by many vehicle manufacturers .
5w20 can provide better protection in climates with lower temperatures as the lower viscosity will improve oil movement in freezing conditions .