"This reminds me of the old wives tale about how you should never let your gas tank run down below a 1/4 tank because it will start sucking up all the dirt and sludge off the bottom of the fuel tank... "
Another "old wives tale" was that a tank seldom filled tends to develop rust in the areas not covered with fuel (exposed to air). Hmmm. old wives tale or real fact?
Sherwood Lee
http://members.rennlist.org/911pcars