I am a little uneasy after opening this filter due to rather large ferrous particles stuck to the can where I put the external magnets. Every other time there was just a grey paste surrounding the areas of the magnets, now there is less paste and more chunky looking bits of Iron. Last time I changed the oil, I had also installed a new Timing chain kit, and I hope this is just from that breaking in. Here is a former photo showing the grey paste from 2 oci's ago: Here are today's photos: This was the dirtiest pleat I could find. The Oil was M1 10w 40 HM. Mostly very short trip driving in a mild climate.