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Discussion Starter #1
I read that it saves your fuel filter. Is this true? Any other possible benefits to not letting your gas go below half?
 

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Never quite heard that before ... I've heard it shouldn't consistantly get into the red, but 1/2 a tank? A bit extreme. Any experts wanna weigh in?
 

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Can't say about the fuel filter benefit, but I don't let the tank go below half, especially in the winter, because an empty tank allows greater room for condensation to develop, possibly leading to rust. It was probably valid years ago, when tanks and fuel system components were primarily metal.
 

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I would say there is some benefit because if you've ever seen what a gas tank looks like inside when its removed u'd never run out of gas again. There is all sorts of crap at the bottom of the tank that you would suck up but most likely only if u ran out completely and not as much so as just running it down some.
 

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Discussion Starter #6
All... sorts... of... crap?! I had no idea gas tanks had significant amounts of debris or sediment at the bottom. :nervous:
 

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Yea probably at least 40-50K on a car a lot of sediment etc. and things from the gasoline itself piles at the bottom of a gas tank which is a main reason there is a fuel filter in the first place.
 

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yeah, the lower the gas level the more crap from gas is sucked into the fule filter causing that to get clogged quicker which will lead to the fuel pump workin harder so in the long run it will save the fuel pump too
 

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Discussion Starter #9
Ah, yes I see now, said the blind man to his deaf son. Seriously though, that makes sense.
 

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The fuel is used to disperse the heat generated by the fuel pump. Running the tank really low regularly is said to shorten the life of the pump. In the winter, it is possible for condensation to build in the tank/fuel lines and cause freezing. More sediment kicked up and sucked into the fuel filter. (Basically everything that has been said) ;)

I say no lower then 1/4 tank. I try remember that but some weeks are more hectic then others.
 

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I've heard that the in-tank fuel pump is a submerged pump that 'utilizes' the fuel in your tank to keep itself cool and running the tank till it's on fumes will cause the pump to run hot and fail prematurely.

However, I have a hard time seeing how I want to use highly volatile FUEL as a liquid to cool anything that gets even remotely hot. :crazy:

I know that traditionally if you let your tank run dry, you run the risk of damaging your fuel pump if there is no liquid to move while it's running.
 

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Yes it does cool and lubricate the pump. No it will not change the sediment getting
sucked up. The pick up tube is at the bottom of the tank.

Yes, I still run mine down to E.
 

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I change my fuel filter at 90K and it wasn't that bad as far as gunk goes. and I'm guilty of letting my fuel light go off occasionally.

as long as you don't let yourself run out of gas, you should be fine.
 

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in my old car i never had it go above half way

fuel = weight

weight = less mpg

so ironicly having less fuel saves fuel

but thats was when i didnt drive alot to work and back now i fill at the ding
 

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I never heard of that being a benefit for the fuel filter, but like Harrisburgjoe said, it is a benefit in winter for less condensation and possible water in your fuel. :(
 
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