Own a '92 F-250 4X4, dual tanks, that is used heavily as a plow vehicle. It has, overall, been a good and reliable performer but, unfortunately, in the 6 years that I've had the truck, I've never been able to get a the fuel gauge to give anything more than an 1/8th tank register, regardless of which tank I'm using. Unfortunately, this has led to alternatingly running one of the tanks empty, then switching to the full one. This, in turn, has led to running the fuel pumps dry, which has led to their premature failure- a costly problem indeed! The last fuel pump replacement (the front tank), I also replaced the sending unit in hopes of that making a difference, which it did not. I'm now highly suspcious of the instrument cluster in general and have noticed that the Amp Gauge shows close to 17 volts when, in fact, at the battery is showing the normal approximate 13-14 volts. Anybody out there have any thoughts on this fuel gauge issue? There are no other electrical glitches that I am aware of. . .