Engine oils:

6 Reasons why a car needs motor oil

Motor oil possesses numerous properties that are important to an internal combustion engine. Most important is lubricity, which reduces wear and increases efficiency. Cooling and protection against corrosion are also important properties of engine oils.

Engine oil has six main purposes:

  1. Minimize friction
  2. Cooling
  3. Sealing
  4. Cleaning
  5. Corrosion protection and acid neutralization
  6. Noise and shock damping

Minimize friction

Engine oil reduces friction and is especially relevant as a lubricant in the cylinder. This allows the pistons to move without friction.

Cooling

Not all parts of the engine can release their heat directly to the coolant or ambient air. Oil absorbs heat and then releases it at another location.

Sealing

The fine seal, guaranteed by the oil layer between the piston rings and the cylinder wall, is also not to be underestimated. This prevents hot gases from escaping from the combustion chamber.

Cleaning

Oil absorbs combustion residue, dust and other debris and removes them from the engine. The oil filter removes these unwanted particles from the oil so that they are no longer harmful. In addition it also neutralizes acids that can build up and destroy metal

Corrosion protection

Oil possesses a natural protection against corrosion, and neutralizes acids that can affect metal surfaces to ensure a long life of the components.

Noise damping

Closely linked to its lubricating properties, oil also dampens vibrations and thus noises. This increases the driving comfort of driver and passengers.

Why should I change motor oil or top up?

Because engine oil is stressed both mechanically and thermally, not to mention chemically, it is subject to an aging process and must be changed regularly.

Suitable oil filters may be able to remove particles such as dust and combustion residue from oil, but oxidation caused by the so-called blow-by gases, which are produced during combustion, cannot be prevented in the long run.

Also, contamination of the oil by bits of oil resin and steel dust, metal residues and combustion residues cannot be stopped in the long run. Oil can also thicken or dilute: soot particles and strong oxidation thicken the oil. Alternatively, fuel rests or oil decomposition might dilute the motor oil. Since a small portion of the oil always burns in the cylinder as well, the oil level should be checked regularly and the oil needs to topped up if necessary.

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