<font face="Verdana, Arial" size="2">YOU SHOULD NEVER HAVE LESS THAN 1/4 TANK OF GAS IN YOUR TRUCK. ANY LESS THAN THAT AND YOU ARE ASKING TO WEAR OUT YOUR ELECTRIC FUEL PUMP. [/B]</font>
ummm... dare I ask how? Let's dispel that myth right here and now.
I used to build the gas tanks for our trucks (Dearborn Engine and Fuel Tank Plant, Line #3 PIA.. used to install the pumps, OBD-II sensors, rollover valves, crash shields, feed panels, load reservoirs and filler necks and vent tubes... I can even tel you when it was built and on what shift based on the date code on the side of the tank) believe me, there is no amount of gasoline (or lack thereof) that will directly cause the pump to fail on our trucks. It is 100% safe to run the truck right down until it's sucking fumes without any risk of hurting anything (except maybe your pride when you have to call roadside assistance and tell them you ran out of gas).
The only possible problem you may encounter when letting your tank sit near empty is condensation forming inside the tank. This is quite common in the spring and fall when it's humid, but the temps drop below the dew-point at night. Condensation forms inside the fuel tank and can get into the fuel system. A slight amount of moisture buildup will do no harm, as most fuel injected engines can tolerate it. That's why it's better to leave the tank full if leaving for an extended period (with the fuel stabilized, of course, to prevent gum and varnish)... doing so minimizes the ability for moisture to accumulate in the gas.
Sorry for the length.
98 Explorer (Lemon Law Case in Progress)
'00 F-150, X-cab, 4x4, Lariat, Off-road, Trailer Tow, Holandia Sunroof($1000), built 11/99 picked up 10/00!Clear Corners($36), Manik Stainless Steel 1-piece brush guard($700), Custom CB wiring, Uniden PC76-XLW CB radio($100) with K-40 Magna-Mount antenna (for now [$40]), 1 set of 165 watt KC Daylighters (for now... more on the way... $140) Fog Light Switch mod(free!!!), Custom switch mounting plate and overhead console, Bully Stainless Steel Trailer hitch drawbar w/ 2" stainless steel ball($80), Gray Tek Style Soft Tonneau Cover($250), Gray Line-X Bedliner ($450).
List of planned mods: Clear tails, torsion bar tweak, bug deflector, Chrome ORP rims.
93 Probe GT teal, OE rims painted to match, bone stock drivetrain, leaky exhaust.