Facts About Motor Oil

At any speed, oil in a small car works twice as hard as in a big car

Smaller cars with their 4-cylinder engines circulate their oil twice as fast as in the big sixes and eights.  They run at 25 to 30 percent higher revolutions throughout their entire performance range. So there is more friction and heat in the small car engine.  The heat in a small engine can drain the life out of oil which can keep it from cleaning and lubricating properly.

It can also cause sludge and other kinds of deposits to form and clog passageways in the engine.  From there it’s only a short step to pre-ignition, power loss, and premature wear.  Small, as well as big cars, need proper maintenance and care.  Although small cars are easy on gas, easy to handle, and have smaller engines, they’re not easy on the oil.

Changing Oil

The standard for most of the cars is to change the oil every 5,000 kilometers or three months, whichever comes first or as often as possible depending on your driving habits and the road conditions.

Have it drained only just after a hard drive, at least 15 kilometers.  When the oil is hot and thin, sludge will not settle and harden at the bottom of the oil pan.  Or if you leave the car at a service station for a change later in the day, the cold sludge won’t flow out.

Filling with New Oil

Supplemental additives are not essential and are an unnecessary expense.  A good oil brand already has special additives in it.

If you want your engine to run well, do not add things to your crankcase. Put in good quality motor oil and change it only according to the manufacturer’s recommendation.  Use only brand name oil and those that are marked and conforming to SAE specifications.

You should also know that the “SE” designation for motor oil which meets the requirement for high-temperature engine performance is recognized by the automotive and petroleum industries.

An oil with low viscosity grade (like SAE 10W) will flow freely to help a cold engine start, especially during cold weather.

An oil with high viscosity grade (like SAE 40) is thick enough to protect a hot engine, especially during summer.

But aside from those SAE ratings, there are so-called multigrade that can do both (like SAE 10W-40).


Facts about Motor Oil, RAVENOL J1A1821 Euro VI 10W-40

Facts about Motor Oil, Liqui Moly 2043 MoS2 Anti-Friction 10W-40 Motor Oil






Fill up to the full line on the level gauge.  If low, add oil up to the F line.  Never overfill the crankcase.  Too high on oil level lets he crankshaft splash through the oil causing excessive foaming and may lead to excessive oil pressure.

Facts about motor oil-dipstick

To prevent overfilling, the engine should be shut off for about two minutes before removing the dipstick.  This allows the oil in the lines and engine passages to drain back into the crankcase.  Note:  when checking the level of engine oil, make sure the car is standing on level ground.

If the oil is leaking out around the drain plug car’s oil pan, check if the plug is tight.  If it is tight do not apply a lot of muscle to make it super tight.  Over tightening the plug will ruin thread since it has a fine thread.  Chances are the plug gasket has deteriorated and needs replacing.

Changing oil is not just a practice that car owners love to do.  It is a significant thing in the life and service of the car engine.  An efficient car engine oil maintenance means efficient delivery of services to people by the person who owns it.

The Problem of Oil Leak

Before we leave this discussion I would like to remind everyone an issue that anyone might raise.  Someone might say, why is the engine oil dissipates early before the scheduled oil change?  I keep on adding a half-liter or nearly a liter every 500 hundred kilometers or every long drive yet I do not see any drip on the floor when in the garage.

The question is, how did you know it?  Is it through the oil pressure gauge or through the dipstick?

Often times the oil pressure gauge doesn’t tell the truth, especially to old cars may be because of electrical or hardware problems.

But it is wise for the driver to always double-check it through the dipstick as I usually do.  Now, this is what I discovered lately. I did not see any drop of oil in the parking area but when I checked on the dipstick the oil has dissipated.  In fact, I had twice added oil to fill it to the measure because oil change is yet to come.

One time when I was checking something my eyes were set on the stabilizer.  It was a little bit wet with oil and I thought it was just an accidental splatter.  But that led me to think I have to see where it comes from.

I have to remove the cover as you see in the video below so I can check where the leak is coming from.

After removing the cover I have to determine what part is leaking.  I have prepared a video for you to see what I did.  You can watch it below.

Fixing the oil leak

Sometimes it’s deceiving what part is leaking but don’t be in a hurry to do things.  You have to be patient in locating the source of the problem.  From the wet wheel stabilizer that led you to open your engine’s front cover shown below (whatever be the model).  Trace where the oil comes and don’t be fooled by what you see at the lowest part that may have been just a deposit of a long leak.

Start determining traces of oil leaks from the top suspected possible parts that could easily be perforated through high heat like cylinder head cover gasket, camshaft oil seal, cylinder head gasket, front main oil seal, crankshaft oil seal, and oil pan gasket.

Areas of oil engine leakage are as follows:

Now, this is a warning to every car owner, a driver, or anyone who uses a car.  Be a keen observant with regard to oil dissipation in the engine.

If there are leaks you can see through either of the oil seals identified that it is a lot easier and fewer expenses by just replacing those parts.

More Serious Issue

However, if there are no leaks anywhere outside your engine but oil dissipates before the next oil change schedule, that is a more serious issue.  Leaks are no longer outside the engine but it’s inside it.  Why?  Your valve seals or the valve seats may now need replacement.  If not the valve seals it maybe the piston rings so you need to inspect the emission smoke of your car.  A related article (please see the article on bluish smoke) will show you why I said this for your guide.


10 thoughts on “Facts About Motor Oil”

  1. Interesting facts indeed! Unfortunately, there are still many people who are not aware of the importance of changing oil and maintaining their car in general. Those who don’t have car maintenance are contributing to the negative negative effects on our lungs but also on the environment (air pollution, and oil leaks in the ocean). I’m looking forward to alternatives like the electric car that will help improve the situation.

    • Thank you Dira for your comments. I hope all motorists give importance to the changing oil. It is so important in prolonging the service life of any engine.
      You are also right that it will help in the preservation of our health and also the environment. I hope the electric cars will do good in terms of power as the fuel driven engines but for sure they are better alternatives when it comes to life care and preservation.

  2. This is some great advice. My wife has just passed her driving test and will be buying a car very soon in the future. Obviously maintaining it will be key going forward to keep the costs down. So I will share your site with her for sure. Many thanks for the key info. Kenny 

    • Hi, Kenny. I’m pleased you find this site helpful to you. Yes, please share it not only to your wife but to your friends around the world, it would help me too.

  3. A good engine oil is the life wire of every car engine and constant changing of the car engine oil as required is just too important. This can help the car engine to last. It is advised to use one particular good engine oil for your car and not to jump from one product to another as this can virtually affect the engine with time.

    • Thanks, Kenechi. I agree a good oil must be the only one should be used and this can be in the company’s prescription for the car. One indication of a good oil is its viscosity span. If you found an oil that lasts longer in viscosity beyond the prescribed travel distance that is a quality one and you have to stick to that for your car.

  4. Wow, this is really a helpful review on this article. The maintenance of any engine prolongs its lifespan. The most crucial but always neglected aspects of maintenance is oil changing which most people don’t see as necessary. I like this review because it really address the matter of changing oil in a motor car and it’s benefits. This is a wonderful information. Thank you. 

    • Thank you for dropping a comment and appreciating the article.  Would come back and share your experiences in maintaining your car? I would love to hear testimonies and first hand experiences.

  5. I always thought the big engines circulates oil more only to find out from your post that I was wrong.

    I have been using a big engine and have been complaining now I know that the small engine circulates oil more.

    Have had a lot of issues with oil the good and the bad ones.

    I have a question how could one know which is a good oil apart from using the brand name?

    Atimes you don’t find the brand of oil you normally use but at that moment you need to change your oil urgently.

    • Thank you Nsikakabasi. The smaller the engine is the faster it circulates and it follows the oil circulates faster.

      I experienced too a bad oil, it is locally made. I would recommend the synthetic one and you can choose from any brand.


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