A low oil level is one of the most dangerous situations for any internal combustion engine. Engine oil not only lubricates moving parts, but also cools, cleans and protects against corrosion. When the quantity falls below the minimum mark, the risk of serious damage increases many times and can lead to an expensive major repair.
In the following lines we will look at the main risks, the causes of the drop and how to prevent serious damage.
Why is low oil level so dangerous?
The main function of oil is to form a protective film between metal components such as pistons, bearings and the crankshaft. With insufficient quantity this film is interrupted and direct metal-to-metal contact occurs.
This leads to:
- accelerated wear of bearings and cylinders;
- increased friction and a sharp rise in temperature;
- risk of engine seizure;
- loss of pressure in the oil system.
The most critical moment is the so-called oil starvation, where the pump draws in air instead of fluid and the pressure falls below safe values.
What happens when pressure drops?
The oil pump must maintain stable pressure to deliver lubricant to all passages. At low level circulation is disrupted, and the oil overheats and loses viscosity. This accelerates wear and can lead to spinning of the connecting rod bearings or damage to the turbocharger.
Illumination of the red oil warning light means that pressure is already below the allowable minimum. In such a situation the engine should be shut off immediately.
What are the causes of low oil level?
A reduction in oil does not always mean an external leak. Often the causes are complex:
- burning of oil through worn rings;
- worn valve stem seals;
- leak through the oil pan gasket;
- leak from the oil filter or shaft seal;
- incorrectly performed oil change.
If the level drops regularly without an obvious reason, diagnostics are needed.
How to prevent damage?
Regular checks are the easiest way to prevent damage. They include the following:
- check the level on level ground, with the engine off and cooled – the oil should be between Min and Max on the dipstick;
- adhere to the replacement intervals recommended by the manufacturer, usually between 10,000 and 15,000 km – always use oil with a specification approved for the specific engine.
If you hear metallic noise, smell burning, or notice increased temperature, do not postpone a visit to the service shop.
A low oil level is not a minor problem, but a direct threat to the engine – a timely reaction can save you thousands of leva in repairs.
If you suspect a leak or increased oil consumption, book an appointment at our service for professional diagnostics and an oil change today.
