What Causes Engine Oil Shortage In A Car: 5 reasons And Fix

A modern vehicle needs a large amount of oil to perform well. The oil can coat your engine’s moving parts, which are responsible for rotating and sliding against each other with a protection layer. For that reason, the engine parts won’t damage.

Checking your engine oil level regularly is a good idea. New cars don’t need engine oil at service intervals. If you have a frequent engine oil shortage in a car, you should know where the oil goes. It’s because it could be an engine problem. There are several reasons why engine oil runs low frequently.

causes of engine oil shortage in a car

5 Reasons For Engine Oil Shortage In a Car

There are many reasons why engine oil shortage frequently occurs below.

Bad PCV Valve

When you can see your engine burns fuel, it produces waste gases that are mainly expelled through the exhaust system. Nevertheless,

However, some gases force their way into the crankcase, situated at the bottom of the engine. The one-way valve means the PCV valve allows exhaust gases to exit the crankcase. Also, this valve directs the gases back to the intake manifold that was burned by the engine.

Notheseless, if the PCV valve stops working, it can build up pressure in the crankcase. As a result, the oil can go out within the gaskets and seals because there is no way without tension.

Failed Piston Rings

The piston ring serves to seal the combustion chamber. The purpose of these rings is to allow oil to enter the combustion chamber and prevent most gases from entering the crankcase.

Also, engine oil can enter the combustion chamber if your piston rings are bad. Doing so will burn the oil in the combustion chamber, which can cause severe damage.

Burning oil produces thick blue-gray exhaust fumes. If you see smoke from your exhaust pipe, failed piston rings cause your oil problem. To fix this problem, you need to install new piston rings. In addition, it’s a challenging task; to reach the engine ring, you should tear it down.

Engine Oil Leak

Of all the possible reasons, this is the most obvious. If fewer oils pour into the engine, that engine oil has to go somewhere, right? It can be the cause of engine oil leaks. You can know about it because of visible in the form of big black spots under your car. But small leaks don’t reach the ground. With specific tools, finding the oil leak can be easy. Even repairing this type of leak sometimes needs dismantling the engine. If you need to improve or investigate your oil leak, please visit our service center!

Besides this, your engine may leak because of poorly installed and bad oil filters.

Engine Oil Consumption

Adequately, if you notice a sudden loss of oil in your car and no leaks are detected, there have another reason. And it can be the burning of oil internally. In fact, burning a tiny amount of oil will be considered routine, especially as the engine ages.

Slight oil burning means the engine’s primary seals are performing well, but little oil is getting into the combustion chamber. Depending on the car’s age and wear rate, you may need to stop the engine between oil changes.

Nevertheless, a quick oil burn issue can be a big problem. Usually, if you see blue-gray smoke while driving, your car engine burns a lot of oil. Even so, you may need to service your car.

Low Oil Pressure

A low oil pressure also indicates that your car may be a big problem. As your engine oil ages, it breaks down and cannot provide correct lubrication for your engine’s moving parts.

Eventually, you may start hearing all kinds of sliding, knocking noises, scraping, and grinding from under the hood. That is scraping bare metal against bare metal. Typically, this can rapidly destroy engine equipment, leading to expensive repairs.

Read About : Low Oil Pressure at Idle

Effect Of Engine Oil Shortage In Car:

Due to engine oil shortage in a car, your engine will fail. Many fast-moving parts are inside the machine, with lots of possible friction. Engine oil keeps your engine parts sliding smoothly against each other without grinding against each other. Additionally, due to engine oil shortage, your engine will start to rub, then seize and stop your engine. Moreover, the engine will be damaged and destroyed. Many drivers only get warnings about low engine oil once it’s too late.

Newer cars have more diagnostic components, such as dashboard components and oil pressure sensor units. Mainly, they can help detect low oil conditions. In older cars, drivers often have to check the oil manually. The reason is that the “check oil” dash light won’t be enough to alert them to a low oil condition.

How to Fix Engine Oil Shortage In Car Issues:

With a dipstick, you can check your low oil pressure. Check your oil level to ensure it’s at the correct level. Notably, if you see the oil pressure is low, fix the problem as soon as possible. To restore the oil leaking, get a new gasket or seal to fix this leakage.

The valve guides and seals are often worn if your engine is burning oil. But the cylinders and rings can also go wrong. A leak-down test will indicate valve guide or ring and cylinder wear.

The least costly repair for worn guides without pulling the head can be installing new valve guide seals. The best repair could be to remove the head and rebuild the manuals for big valve stems. Worn rings and cylinders will require a complete overhaul.

Furthermore, check the oil condition and ensure it has the correct viscosity for your application.

FAQ (Frequently Asked Questions):

Q. What happens if engine oil is low in a car?

When your car engine oil is low, it stops lubricating the components of your engine. Likewise, if they are no longer well-oiled, they make loud rattling, knocking, and grinding noises. Therefore, your rod breaks because of it, which will stop the knocking noise from under your car hood.

Q. Why is my car losing oil but no leak?

When a car loses oil, there are generally two possible reasons: leak or your engine is burning it. While you may not notice any visible leakage signs, burning oil is the culprit.

Oil burns when faulty engine parts allow oil to enter the combustion chamber. Blue-colored smoke coming from the exhaust is a possible indicator of this problem.

While it’s normal for some cars, if you’re constantly experiencing low levels, it’s best to get your vehicle serviced quickly.

Q. What Is High Engine Oil Consumption Caused?

Piston rings seal the empty place between the cylinder wall and the piston. So, if they are worn out or damaged, they consume higher oil. Engine oil slowly passes among them and, as a result, enters the inside combustion chamber.

Ultimately, this causes the oil to burn, while carbon deposits on the piston rings.

Final Word

On the other hand, if you know the reasons for engine oil shortage in a car, you can fix them quickly. Actually, this is the guide where we discuss reasons for low engine oil and how to fix them.

Please get good information from here. And we also hope you can fix any reasons and symptoms as soon as possible if you have noticed any causes and symptoms. Our guide will help you to resolve any oil shortage problem. Thanks for staying with us.

Read Also : No Oil On Dipstick


I am Engr. Z Eusuf Lubricant Specialist, Mechanical Engineer & has been working with engine lubricants for a long time and knows what makes them work best. I can help you find the right oil for your needs, and I have tips on how to keep your engine running at its best.