it's not really added insurance is all. The stuff is suposed to get stuck to the filter you are NOT going to plug a filter in 4,000 miles and if you do your motor is gone anyway. A better use of that 30 dollars would be buying a flat agnet and sticking it to the oil pan not the filter. especially if you could put it where it will catch stuff before being pulled into the pickup. If all you want is to stick magnets anywhere you can then why not have cow magnets epoxied all over the inside of the block?
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