In these cases, the engine oil becomes unusable

Engine oil is one of the important elements on which the quality of a car engine depends, so it should be of interest to motorists.

In this regard, a German car expert, Gert Schleichert, warns that the engine oil is exposed to damage, noting that the most important reasons that lead to this are the expiration of the expiration date of the engine oil, which is written on the package, and it ranges between 3 to 5 years in If the package is not opened or stored.

But if the package has been opened, then in this case, one of the experts of the German Automobile Club ACE advises, in this case it is advised not to use it after a period of 6 to 12 months, stressing that traditional mineral oils generally have a longer shelf life than modern oils that It contains additives that degrade over time.