Super Black Hole® Oil Filter magnets do your machine good when it’s running. When oil is passing through the oil filter, the Black Holes pluck any ferrous metal particles right out of the oil stream. Comes in a pack of 4.
The significance of metal contamination of motor oil is a real concern. According to the white paper General Motors published, it stated that by using bypass filters you could get the micron size of metal contaminants down to 10 microns. Their testing proved that by this reduction in micron size alone, you could extend the life an engine by a whopping 70%.