What is Car Oil? Types, How to Check Your Car Engine Oil? When to Check?

Do you have any idea on How to Check Your Car Engine Oil? You are likely to make the largest investment in your vehicle, whether it is an SUV, truck, or car. It is possible that if a vehicle is well maintained, it may last 250 miles or more. Each year, the prices of new and used vehicles rise. Make sure that the upkeep of your vehicles is one of your most important responsibilities.

The average interval between oil changes in today’s car is 10000 kilometers or more. When there is traffic congestion and slower speeds, the engine runs longer, and more oil is used, especially in older cars. When engines are running on low-level oil, they may suffer damage to their internal parts. When you notice that the level of oil in your engine is low, it is recommended that you check the oil level every few weeks.

What is Car Engine Oil?

What is car oil & How to Check it? This is a very common question for everyone who drives a car! Let’s start with the basic concept before the process:

Define Car Engine Oil?

Your Engine’s longevity and performance are dependent on Car engine oil. Because its lubricant’s properties stop all those metal parts of the engine from tearing each other out or welding themselves together like an anchor. Your engine destroys itself in seconds if you do not have car engine oil.

Production of Car Engine Oil

Car engine oil is largely composed of base oils. By lubricating internal moving parts, absorbing heat, and sealing piston rings, they ensure that motors work efficiently.

Chemically synthesized materials, petroleum, or synthetics are all alternatives for car engine oil bases.

Define Crude Oil

Now, before we go any further, here’s a little science: it’s a fairly good bet that, unless your only interactions with planet Earth are to do the odd fly-past in a spaceship powered by decaying space carrots, you’ll have used anything that’s fueled by oil. The modern world, first from gasoline in your car to machinery used to generate energy, is built on this.

Oil’s raw form is known as crude oil, but boil it up at the right temperature and it soon turns into all sorts of other useful things like cosmetics, cleaners, and nylons. Crude oil manufactures the engine oil that put the engine of your car smoothly.

Also Read: Types of Cars

Types of Car Oils

Synthetic Oil

It is easier to control the production process when all materials are kept to high standards when producing fully synthetic motor oil in a factory or laboratory. The downside is that fully synthetic oil is more costly.

In general, you’ll pay a bit more for oil change if you use full-synthetic oil, but not by much. It depends on how much your car uses.

Furthermore, synthetic oil lasts longer, going further and longer before they need to be changed than conventional oils.

Traditional Car Oil

The viscosity and engine protection properties are improved using different additives and processes, and then it’s bottled and sold for use in your engine. 

This has its upsides and downsides. For starters, it is cheaper. It is a cost-effective way to keep your engine protected and your car running smoothly.

Even though you acquire the appropriate weight and amount, you should anticipate acceptable performance. There are also not many bad motor oils on the market anymore. They are, however, more of a downside as compared to its other types. They tend to be less refined due to the naturally occurring materials. In addition, they offer less protection than other types of flooring.

Synthetic Blend Oil

Synthetic Blend Oil is a hybrid oil produced from both synthetic and amp; natural materials. In other words, it combines synthetic and traditional oil to improve performance & reduce drawbacks. Compared to conventional oil, they are a bit more expensive, but not as much as full synthetics. In general, they’re a good bridge between maintaining costs and adding a little extra value to a car.

High Mileage Oil

There is a branch of oil known as high mileage oil whose only purpose is to help prevent oil evaporation and boost overall performance. High Mileage oil has its own additives that are meant to protect engine seals.

As an odometer on a car gets a little bit of older, this kind of extra protection is really beneficial as oil burn-off is a bit more common, resulting in more wear and shorter engine lifespan.

Also read: Types of bikes

How to Check Car Oil? Step by Step Process

Turn off the Car

You must ensure that the car is parked on the flat-leveled ground & it is best to stay away from ramps or uneven patches of the road as a tilt in vehicle position can cause engine oil to get contaminated.

Cool down to your Engine

It is never a good idea to check the oil level when the engine is hot. At least ten minutes of cooling is required to ensure that all of the oil from various parts of the engine is collected in the lower oil pan. In addition, this helps to bring down the oil temperature to a certain extent.

You can check your car’s owner manual carefully as a lot of manufacturers do not give enough advice on checking the oil level on a cold engine.

Checking Your Engine Oil Level with Dipstick

If your car has a dipstick, checking the oil level is straightforward. Make sure the car is turned off, and then pop the hood or rear bonnet, if your car is the mid- or rear-engine.

Find the handle for the dipstick normally designated in yellow or red, with an oil emblem embossed on it, and remove it out of its tube.

With a clean cloth, clean off any oil, then re-insert the dipstick back into the tube.

Make sure it’s completely reinstalled and placed correctly to guarantee you obtain an accurate reading. Once you wipe it clean, insert the dipstick back entirely. You can wait for a second and take it out.

Check the Oil Level

Observe the oil mark this should ideally be between the minimum and maximum marks.

The dip-stick generally has low or high, minimum or maximum values on it.

If you’ve recently been driving your vehicle, your oil level may appear somewhat lower than if it’s been resting for a few hours.  This occurs because part of the oil may still be dispersed throughout the engine, and has yet to settle to the bottom of the pan where the dipstick resides.

  • If the level is low, do fill up the engine oil.
  • Be cautious to use the same grade oil to prevent any injury to the engine components.
  • Never top up the oil beyond the specified level.

So unless you’re afraid your automobile may be burning or leaking an excessive quantity of oil, it shouldn’t be a problem.

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5 Steps to Evaluate Oil using Dipstick

Dipstick Retrieve

  • With the engine hot, park on flat ground and cut off the engine.
  • Sit tight for several minutes for the oil to restore to the oil pan.
  • Open the hood and locate the dipstick on the engine – a metal loop or grip poking out of the end of a metal stalk.
  • If you can’t locate it, your owner’s handbook should assist.
  • With a cloth or thick paper towel in one hand, pull on the metal loop or grip and remove the dipstick with the other.
  • Wipe the oil-wet straight end of the dipstick and insert it back into the stalk you drew it out of.

High-Level Oil

Oil levels may sometimes increase after you checked them last or the dipstick may contain too much oil. This could be caused by condensed water from combustion, condensed gasoline, or a coolant tank.

  • Combustible engine oil or loss can significantly reduce the viscosity of the oil and the subtle additive concentration.
  • The stench of diesel fuel may frequently be perceived immediately from the dipstick.
  • Too much water is detrimental to the oil and the engine.
  • For short-duration drivers, water condensation may be more intense if the engine is equipped with the flex-fuel vehicle option and  an alcohol-gasoline mixture is used.  
  • It is crucial to understand that combustion creates water in your engine – more water than the gasoline burned.  It is essential to understand that combustion creates more water in the engine than burning gasoline.
  • In normal circumstances, most of the water travels out of the tailpipe. However, if the engine is chilly, quite a bit of it could condense within the crankcase.
  • In this situation, it may be necessary to replace the oil and the filter.
  • Short-run engine starts, as many as fifty, are required when a vehicle is transported from the assembly plant, over the ocean, and finally to the dealer’s lot, hence brand new cars imported from Japan may have a high oil level. 
  • In this situation, an oil and filter change may be merited.
  • Whatever the reason for the excessive oil level, the issue has to be swiftly corrected. 
  • Accidental overfilling of oil into your engine might create troubles too. As the crankshaft turns it will churn the oil, generating aeration, and ultimately persistent foam may form. This may lead to hot motor oil, oxidation, and a loss of oil pressure. 
  • Spongy aerated oil is hard to pump. It starves the engine and key lubricated surfaces.

Also Read: What is Governer

Low-Level Oil

You can determine where the oil ends by examining the dipstick’s tip. Some marks indicate the level the oil should reach.  Sometimes there are gaps instead of markings.

  • If the oil doesn’t arrive inside the markings or slots on the dipstick, you have to add at least one bottle of oil.
  • If the dipstick is not displaying an oil level, you need to add oil immediately.
  • The quantity of make-up oil you would anticipate applying can vary based on the age of your automobile, type of engine, overall miles, and driving circumstances. 
  • The dipstick acts as a measurement for high oil consumption.
  • The real concern is about a quart for every 1,000 miles or 0.90 liters approximately for every 1,500+ kilometers.

It’s time to schedule an overhaul if the problem increases to one quart every 500 miles or 800 kilometers.

Color of Oil

Oil color and quality indicate the engine’s age, as well as issues with the efficiency that need to be addressed. The moment you remove the dipstick, you will be able to see how the oil in your engine is doing.

Excellent engine oil should appear somewhat yellow-green on a rag, but should not appear extremely dark. You can take the cloth and wipe the oil off the dipstick’s end. 

The oil will change color from golden or amber  to brown and black as more particles enter the engine oil.

Metal filings and particles will slowly scrape the cylinders of your engine over time, which is why the oil has to be changed according to the manufacturer’s suggested service interval.

The color of your oil should be an indicator that it needs to be replaced if it is brown or black. It’s a good idea to get the oil changed or to take the car in for servicing.

Also Read: What is Engine

Signs of Aged Oil

Oil is not like a superb wine that becomes better with time. Instead, it matures at a pace that is controlled by driving circumstances, fuel quality, engine age, motor oil quality, and environment. If not changed in time, your oil may wither and fail to protect your engine.

I recommend taking a good look at the oil on the dipstick and finding out whether that is the issue. The oil should be smooth and shiny and slightly translucent. If it has any muddy deposits or bits of gritty dirt, maybe it is time to change the oil.  The same is true if the oil appears too thick, is too black, and has a horrible rotten-cheese smell.

Coolant Leak Signs

Brown bubbles or a dried crusty-brown residue above the oil level line on the dipstick might be an indicator that coolant has seeped into your engine. The oil on the dipstick can even appear like chocolate milk. Never taste engine oil to test antifreeze.

Another notable symptom of a coolant leak is white exhaust smoke that has a pleasant odor. In this situation, the dipstick oil level may actually increase, suggesting a considerable quantity of coolant has spilled into the crankcase.

  • To confirm a coolant leak, stop the engine, let it rest for an hour or two, unthread the drain plug and use a transparent glass or plastic container to capture the liquid. Because both water and antifreeze are heavier than oil, they will pool up at the bottom of the oil pan.
  • Collect a couple of ounces of fluid and promptly retighten the drain.
  • Glycol and water often seem like a thick mayonnaise-like mixture, depending on how long the coolant has been in the crankcase. You could also perceive a nice antifreeze fragrance.
  • If you have found coolant in your motor oil, your engine should be brought in for emergency servicing.

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How to Add Car Oil?

Read Car User Manual

If you are adding oil to your car, you need to determine the type of oil. The type of type can vary from model to model and season to season, so it is important to always check.

You should check the owner’s manual carefully or consult your local mechanic before adding oil to the car, as mixing different grades of oil is generally a bad idea.

Find Oil Cap

Adding the oil can be done via the oil filler cap which is also located near the dipstick cap.

Be careful adding the oil and do not spill it over other parts of the engine. Give a gap of a few seconds before checking the oil level again as oil takes time to settle down due to its high viscosity.

You should remove the cap, wipe it off with a paper towel or the rag you’ve used, and insert a clean funnel.

Add Oil in small parts

It is important to allow time for the additional oil to drain down into the oil pan. After filling up the funnel suddenly, the liquid should slowly drain down & be careful not to overfill the funnel.

Although spilled oil will smell bad and may smoke, spilled oil is usually not a real threat. You use a rag or a towel to wipe it up as best as you can.

Check Oil Again

Make sure the level is correct by removing the dipstick. This process must be repeated until the appropriate amount of oil appears on the dipstick. It should be cleaned after each reading. Check to see that you have tightened the oil fill cap and that the dipstick is fully seated after you have finished.

Also Read: Fuel Pump

What Would Happen if You Neglect Checking Oil Level?

If engine oil changes have been ignored, there is a considerable probability carbon deposit and sludge have built up in the engine. A simple way of looking for this is to start removing the engine oil filler cap and use a flashlight to take a peek into the engine.

If the engine parts you can see are covered with thick black deposits and sludge, this is a shred of evidence the engine oil has not been changed regularly. If you can see the thick black dirt on top of the engine, it most certainly resides throughout the whole engine.

If the automobile you are inspecting is one you are contemplating purchasing it would be advised to avoid this car if it displays evidence of carelessness about oil changes. By locating the correct gauges in the engine compartment, diagnosing oil problems, and dealing with those issues, if necessary, you can keep your engine in good condition.

What is Car Oil Leak? Define

Oil Leaks can occur because of worn out engine gaskets, oil leaks from oil pan, or loose or missing oil pan drain plugs, deteriorated valve cover gaskets, etc.

It is very dangerous to start your engine when there are large puddles of oil on the ground. If you see large puddle on the ground, don’t start the engine.

You might not be enough oil left to lubricate your engine, causing permanent damage that can be only repaired by rebuilding or replacing your engine.

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Can a Car Catch Fire Due to the Oil Leak?

Various types of oil may be found under your car, such as black puddles or a gaping hole caused by damaged or old seal. When your car has an oil leak, you are at risk both yourself & other driver on the road.

The oil in your engine is essential for keeping moving components cool and lubricated when driving. If your car has an oil leak, the engine might wear out prematurely, leading it to freeze up abruptly.

What are the Signs of Oil Leak?

Oil Level drops Quickly

Make sure that every week you check the level of oil to determine how severe the leak is. An oil change is generally required every 8,000 to 12,000 miles on modern vehicles. In other words, anything other than this indicates that you have an oil leak. It is highly likely that your vehicle will catch fire if you leave an oil leak unattended.

Warning Light in Dashboard

The undercarriage of modern cars is often shielded from the elements: therefore, you will seldom see a puddle under the vehicle when you have an oil leak.

A dashboard warning light will appear when your vehicle has low oil levels. An oil level or oil pressure warning light indicates that a high level of oil is present. Consequently, you must check the current oil level with a dipstick and top it off as needed. Check the level of oil in your car after a few hours to determine whether it is back to normal. Your car has an oil leak if the engine oil level varies dramatically.

Smell of Oil Burning

Oil that leaks to hot surface in the engine starts to burn, emitting a nauseating smell that may not be noticed until you switch off the engine & step outside.

Color of Oil Leak

If you see a puddle of greasy-looking brown liquid under your car after it has been parked for a while, you may have an oil leak. On the other hand, if you see pink fluid, it is transmission fluid, if it is green or orange, it is coolant.

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Overheating Engine

The oil prevents friction between moving parts and cools the engines and other moving parts. An engine’s crankshaft, pistons, piston rings, and connecting rods will grind together without adequate oil lubrication, producing enormous heat.

Consequently, you will be notified when the engine temperature sensor senses a rise in temperature, which is usually caused by an insufficient amount of oil in the engine. Overheating, stalling, and subsequent engine overheating may occur if engine oil drops too low.

Are oil Leak fixable?

Oil leaks that are fixed by expensive repairs are few and far between. You will only require a car jack, jack stands, a torque wrench, and some modifiable additives or replacement parts to repairs most oil leaks in your garage or driveway.

Also Read: Gear Box

Signs of Checking Your Car’s Oil

Noise of Engine

Oil creates a safety barrier between engine components, preventing metal-to-metal scraping and keeping the engine quiet. If your oil isn’t performing its job correctly, the engine noise will grow. In extreme circumstances, you may even hear banging or rumbling noises that suggest your engine is breaking itself apart piece by bit from lack of lubrication.

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Bad Oil Smell

If you smell oil inside the automobile, it might typically imply an oil leak. If you also smell gas or exhaust fumes, the car may be overheated. Either way, you will want to arrange maintenance promptly.

Engine Check

The most apparent signal that there’s a problem with your oil will come from the automobile itself. The oil change light in your car will appear when there’s not enough oil in the system.

Smoke Exhaustion

Some translucent vapor will always flow out of your car’s exhaust, but if this turns to smoke, it’s time for an engine check-up. You may have damaged engine parts or the possibility of an oil leak.

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Is it possible of evaporation of car oil?

Quick oil consumption may be a sign of engine trouble or regular engine operation depending on the model of the vehicle and the capacity of its engine. It is normal under certain conditions to consume one quart of oil every 500-2000 miles.

The amount of oil consumed is comparable to water evaporating on a hot and sunny day. Simply exposing oil to air does not cause it to evaporate; instead, it is either leaked externally or burned internally within the engine.

Benefits of Checking Your Car’s Oil

Longer Life of your Engine

Oil is the lifeblood of your vehicle. It greases and safeguards your engine and many of its vital components from wear and damage.

The difficulty is that oil becomes filthy. By making sure that you get your oil and filter serviced according to your owner’s manual guidelines, you will keep your engine clean and safe, as well as save time, money, and worry.

A regular schedule oil change is an investment that will help guarantee that you will be driving around in your car for years to come.

Better Gas Mileage

Finding a car that is excellent in petrol is crucial to all of us. Overall miles per gallon are impacted by a variety of variables including environment, topography, personal driving habits, and vehicle maintenance.

Without regular maintenance, all the dirt and grit we spoke about before will build up within your engine generating friction, and friction is no friend of your engine. Friction is the enemy of engine performance and maximum fuel efficiency.

Making sure that your engine always has clean oil in it will assist to decrease friction, enabling your engine to operate more effectively with the highest potential gas economy.

Also Read: Diesel Engine

Better Performance of an Engine

Over the period, old oil starts to break down result of exposure to heat. This leads it to lose its viscosity as well as its capacity to lubricate the engine cylinder walls. Essentially, the rougher the oil gets, the harder it is to travel where it needs to.

That muck starts to build up in locations restricting the flow to sections that require lubricating. Another job of oil is to extract heat from your sections of the engine. If they are coated with muck, these areas remain hotter longer.

Wrapping it Up

The next time you refill your car with gas, spend a few minutes evaluating the engine oil level and oil quality. Make sure you are informed of your next engine oil and filter replacement due date and follow this plan accordingly.

You will be amazed at how long an engine lasts if it has had its engine oil and filter changed regularly.


What can you check on your car oil?

If it is thin, dark and smells like rotten cheese, it is time for oil change.   The oil looks like smooth and glossy, and is somewhat transparent, is perfect for your car.

Is it right to change oil too frequently?

It’s a waste of money, time and resources if you change your more often than you should.  It also harms the environment to throw away oil that’s still usable.

Does Engine Oil Expire?

Synthetic Oil & Synthetic blend oil have a shelf life of 7 to 8 years, and maybe longer. Conventional Oil has a shelf life of 5 years.
If you can’t find the expiration date, make sure that you do not keep or opened or half opened motor oil bottles for more than 2-5 years after they are produced.

What are safety precautions when checking and adding engine oil?

Protecting your eyes from debris could cause injury if you don’t wear safety glasses when you’re under the car.
You should wear gloves to prevent burning your hands on filters or oil, and long sleeve shirts to protect your arms oil and burns.

What are hazards of changing oil?

Workers can still be exposed to a wide range of health risks when handling oil including sensitization and irritation, as well as physical risks such as slips and falls.

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