Magnetic Gas Saver?

[LearjetMinako]

The magnet can also be used to hold the fuel line next to firewall.

 

[feellnfroggy]

Isnt that magnet supposed to collect up metallic particales in the fuel or sumthin? Wouldnt it eventually clog the line or send a "clump" of metal through the lines when it builds up too big? At the same time, arent we supposed to filter out hte metal from our oil? not our gas?