I often see posts that running your car close to empty or buying gas from "the bottom of the near empty tank", gave me dirt/gunk etc". This can not be...your car tank fuel pick is ALWAYS at the bottom of the tank. If bad stuff is there it will go into the pump when ever you run the car. Unless you have floating dirt which is never mentioned rather than all the stuff that settles "down there" including water. I bet fuel station tanks do not have floating pickups for pump intakes...so settlement debris will always be at the bottom of the tank in the pickup location. Correct, no?