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Apparently they keep the particles that are thinner than the oil filter can actually filter. I'm especially interested in having them on the diesel filter. And any good magnet will do the same thing, especially the magnets from an old hard disk.
I think an oil analysis after the magnets will show significant drops in the metal from the oil, which makes sense, the side effect would be to never know if you have an issue since an oil analysis would not show the metallic concentration accurately. Anyways, the price is a bit high, it's about 160-ish for 2 of them... I ordered an oil filter set and I'm thinking about a diesel one.
_________________ 2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.
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