disadvantages
　　There are two major shortcomings, and the new product to make up for the shortcomings, so it is necessary to use the new product magnetic oil filter.
　　Disadvantages 1: filter 60% impurities in the oil, low filtration efficiency;
　　This is because the existing oil filters rely on a single paper filter core hole to intercept and filter out the harmful impurities in the oil, the smaller the filter paper pores the better the filtering effect, but the oil passing ability is poor. In order to solve the contradiction that the impurities of the smallest particles can be filtered out on the same filter paper microholes and the sufficient oil supplied to the engine can also pass through the microholes. According to the filter branch of the national internal combustion engine industry association, the best oil filter on the market can only be designed to remove 60% of the impurities in the oil, which is the maximum filtration value obtained after thousands of experiments. In actual use, there are still 40% of the harmful impurities, which cannot be effectively filtered out by the paper filter core. Among these 40% of impurities, ferromagnetic impurities are relatively small and hard, so ferromagnetic impurities are in the majority, which will cause the greatest damage to the engine.