
During the experiment we had a pre-filled counterfeit (fake) cheap filter. We showed a problem with the anti-drain valve, which is never visible externally. However, in this experiment, it can be clearly seen.
When the anti-drain valve of the oil filter does not work and does not retain oil, it greatly affects engine wear and causes oil starvation. The conclusion of the experiment is unambiguous: it is necessary to buy quality oil filters.
A pre-filled filter accelerates the filling of the lubrication system at startup, but the time difference is insignificant. It will not damage the engine, even if a dry filter is installed. It is possible to pre-fill the filter and it will not harm the engine either
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