The oil filter “NEOMAG” patented by Master-Sport Automobiltechnik (MS) GmbH with dual engine protection at work in the moderate and severe climate. The magnetic element, which is made from neodymium magnet is 10 times stronger than ordinary magnets, catches the metal swarf located in oil circulation. The sealing material is holding tight even at critical temperatures. Highest quality of the filtering material guarantees the cleanness of the oil. The construction of the flow valve excludes the under supply of oil in the engine and guarantees continuous lubrication at non-working (clogged ) filter element. The return valve does not allow that the oil flows back from the filter and system. Each filter is tested for leaks and for the opening pressure of the pass valve.