Best Mechanical Fuel Pump

Here's a tidbit I learned from my brother several years ago... Being in field failure analisis he looked at quite a few electronic fuel injectors that were blocked open by debris.. Keep in mind these injectors were pulled from fairly new vehicles still under warranty. Some of the debris was plain ol' dirt. A large percentage of it was shards of metal. These tiny swords traveling under pressure went right through fuel filter elements.
100% of this foreign material came from the fill nozzle on the gas pump. Either sheared when the nozzle hit the filler tube or just dirt collecting on the nozzle while it hangs on the pump.
We never think about the dust and dirt that is stirred at the pump island.
Bottom line, A samll amount of debris in the fuel system cannot be prevented.