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how low can you go... fuel tank capacity

12368 Views 34 Replies 12 Participants Last post by  bigshotdan
managed to go 14 miles past "zero miles to empty" and then put in 12.5 gallons.

what is the most anyone has put in without going empty / after going empty?

wasn't trying to.. just turned out that way.
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Another reason to keep your fuel tank full is condensation. Keeping your tank full reduces the amount of condensation that can form on the tank walls.
Where do you think the fuel pump picks the fuel up from?, the bottom of the tank. You really need to think before you open your month wash. Some of the stuff you come out with has real merit, other stuff like that is just complete rubbish. As for trying to work out how much condensation is going to form in the fuel tank, lmao.
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Mate, I think you may be just looking for a argument, simple as that. What you said and I will quote " If you always keep your tank full, lots of junk from the fuel can settle in the sump because its never getting close to empty, then the first time you have to drive until its near empty, that's when all of the garbage hits your fuel filter all at once ".
Thats incorrect and illogical . Don't you think that when you drive around and the fuel moves in the tank that the contamination will mix with the fuel and then get sucked up by the pump pickup whether its full, half full or near empty?
As far the location of the pump pickup being not directly at the bottom, fair enough but it is very close to the bottom for obvious reasons.
Ford Pinto, I've read the story before. Can't see the relevance.
As for the maths, I have no interest in calculating exactly how much condensation may form. How could it possibly be accurate?, and of what use?.
Fact, under the right conditions condensation forms in fuel tanks. The lower the fuel level the more condensation that can form. If you want to calculated it, go for it.
Is it enough to cause problems?, well in common rail diesel engines it can cause injector failure where the tips are blown off and damage to the high pressure pump. Gasoline injection?, runs significantly lower pressures but I would prefer not to find out.
Once water enters fuel it forms in 3 ways, Free state, Emulsified and Semiabsorbed. Its the semiabsorbed that can do the real damage to the fuel system.
What pissed me off was the fact you simply dismissed the idea that condensation could be create real problems when you have No first hand experience with the issue. Google will only get you so far.
There was no name calling, I gave a rather harsh option of the first part of your post and laughed at the idea of trying to calculate the amount of condensation that may form in certain conditions ,a little unkind so I apologise for the Lmao part, but I have seen first hand the damage water in fuel can do.
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More mathematic calculations to support wash's theory that formation of condensation may not be enough to cause a significant problem. in your fuel tanks.pdf
I'm not totally sold on the maths-yet. I've work on machines with fuel tank capacities up to around 3000 litres and high fuel use, talk in gallons per hour. This gives me a different perspective. I think there are more variables here and I need to do a bit more research before I am convinced condensation is not a issue for light vehicles.
The other issue and Dave spoke about in his post above, is pump cooling.
You may have more trouble than most of us as gravity effects you differently.
Heck even your toilets swirl in the wrong direction.

Another reason why we suffer more from condensation too.
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