When will the car magnetic screw be replaced?

Automobile magnetic screws should be replaced every 3 months. According to the relevant public information, most of the automobile magnetic screws are 5000 kilometers, or they are replaced once every three months. When replacing bolts and screws with magnetic oil of automobile engine, it will be found that the screws are covered with tiny metal, which is an important role of replacing bolts and screws with magnetic oil of automobile engine. It can absorb tiny iron powder produced by long-term high-temperature operation of the engine, thus preventing the reliability of the oil.