At what point do you guys fill up at the gas station?
#41
Keep in mind the fuel in your tank is probably warmer than the outside temperature when the car is running. The fuel pump, return line, and even exhaust can cause the fuel to warm, even slightly. As the fuel cools down, the warm, moist air in the tank results in condensation. Displacing as much air from the tank, and having a lesser exposed surface area in the tank, lessens the likelihood of condensation forming.
Terry
#42
Wow that is great information. I never knew that about cars. Where does this apply? I live in SoCal. It gets cold to like about 60-65 degrees average. Or does this apply to only extreme cold?
#43
Condensation is a minor issue for those of us in coastal SoCal where temps are generally moderate.
However, it's also bad to run the fuel tank close to empty due to sediment at the bottom of the tank getting into the car's fuel filter and pump. There is concern that the pump can overheat and fail while trying to deliver fuel from an empty tank.
However, it's also bad to run the fuel tank close to empty due to sediment at the bottom of the tank getting into the car's fuel filter and pump. There is concern that the pump can overheat and fail while trying to deliver fuel from an empty tank.
#48
#53
i really don't believe so many people run it down... the fuel pump requires fuel in order to cool properly, running it past half reduces its cooling capabilities
According to several fuel-pump manufacturers, one of the leading causes of in-tank fuel pump failure is starvation. Most tanks have baffles or a built-in sump that keeps the pump submerged in fuel. These pumps use the fuel as a cooling agent. So far, so good; but if the gas tanks contains only a gallon or two of fuel and the vehicle is driven hard around a corner, the fuel may slosh away from the pickup and momentarily starve the fuel pump. Repeat this process a number of times, and the pump will ultimately suffer (no more cooling and it will eventually expire).
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