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Filtermag Filter Magnet - RA250 RA250
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Filtermag Filter Magnet - RA250 Filter Size Range (in): 2.500-2.750
Magnet Width (in): 3 in.
The RA Series of FilterMAG™ can be used for both standard and Hi-Performance engines. This baby is built for the demanding needs of large diesel trucks and heavy duty applications. The RA Series provides extra power where its needed most.
Below is a picture of the inside of a Mack oil filter after 6000 miles using a Filtermag Filter Magnet.
A perfect oil filter media would stop all the particles down to 1-micron (about 1/70th the thickness of a human hair). Unfortunately, a filter with ports that small would also restrict the oil from returning to the engine fast enough, resulting in catastrophic equipment failure.
An SAE report by David R. Staley, General Motors Corp., states:
"The smallest particles most popular filters captured with high efficiency are sized 25 to 40-micron, depending on the filter brand...[however] controlling the abrasive contaminants in the range of 2 to 22-micron in the lube oil is necessary for controlling engine wear."
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