Quote Originally Posted by thesals
magnets seem to be important on new cars...... when i do oil changes in the shop(which is hardly ever) i always get crap on the magnetic plugs, even on first oil changes...... especially on GM and Toyota cars.... maybe its something to do with how they build them.... but thats my 2 cents
That is what my point was - a fresh machining of cast iron + no detergent wash = iron particles on a magnet.

After the 2nd oil change, probably little or nothing adhering to the magnet.