The national average price for a gallon of diesel dropped 3.3 cents to $3.549, according to the U.S. Energy Information ...

The national average diesel price declined to $3.582, while the national average gasoline price dropped to $3.069, according to data released by the U.S. Energy Information Administration.

A float rides on the fuel’s surface and acts on an arm connected to the variable resistor to ground. When the float is high, current flow to ground is low and the gauge reads full. When the tank ...