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Tasks of the motor oil
Lubrication
Motor oil lubricates mechanical engine components. As a result, it reduces friction between moving components (preventing metal-to-metal contact) and thus wear and damage to the engine.
Cooling
Motor oil helps to cool the engine components. It ensures heat dissipation in the engine so that it does not overheat.
Cleaning
Motor oil cleans the engine. Combustion residues, metallic abrasion and deposits are absorbed by the oil and transported to the oil filter.
Sealing
Motor oil helps to seal the piston rings to the combustion chamber and thus prevents pollutants from entering the oil circuit.
Corrosion protection
Engine oil forms a protective film over the metallic surfaces. This prevents exposure to air and condensation and protects the engine from some aggressive combustion products.
Why does the engine oil need to be changed?
Motor oil consumes and contaminates itself over time. For example, due to combustion in the engine, dilution with fuel or condensation, natural oil aging and mechanical abrasion.
Only a regular oil change, i.e. replacing the old, used oil with new oil, ensures reliable engine function and increases the service life of the engine.
The perfect oil change consists of:
- Motor flush
- Oil change
- Wear protection additive
All dirt and deposits inside the engine are removed by flushing the engine with Motor Clean before the oil change. The used oil is then completely removed from the oil circuit by draining. Because only in a clean engine can the fresh motor oil achieve its full performance. The engine then runs even more effectively, quieter and is more economical in consumption.
To ensure optimum long-lasting protection, we recommend adding the wear protection additive Cera Tec to the fresh engine oil when changing the oil. Thanks to the smooth-running effect, it also reduces friction, wear and fuel consumption and thus also increases the service life of the engine.
Our modern engine oils are both high-quality and officially approved by many manufacturers. Often, they even exceed the manufacturer’s specifications.
Which oil is right for your car?
When it comes to oil, LIQUI MOLY is your best choice. Use our oil guide to find the right motor oil and other suitable operating fluids for every vehicle.
* For years now, readers of Germany’s leading car magazines have voted LIQUI MOLY the best lubricant brand.
More answers to your questions
Do you have any unanswered questions about motor oil? Take a look at our FAQs. You may find the correct answer there. Alternatively, our technical advice is of course always available to you in person.
