I'm curious, is there data to show that there are more metallic particles created during the first few miles than there normally are? I can see where the manufacturing process might leave some residues in the engine, but if it were a problem wouldn't Toyota and Honda, with their emphasis on reliability, have done something about it by now - maybe fit the car with a magnetic drain plug or flush the engine prior after assembly or something? And if it's not residue, then it must be shavings from the manufacturing process? Again, would they really let that happen if it were a problem?

I'm not saying it's wrong, just curous about it.