this isn't technically correct. the low levels are not causing the corrosion. it's the contaminants that float in the fuel is the issue. when the tank has plenty of fuel, those floaters are not near the fuel pump. as the levels lower, the contaminants become more concentrated and are more likely to interact with the pump. at least, that's how it was described to me. by described, of course i mean harped on at every opportunity the parental unit could berate about lack of proper care for the car blah blah blah