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Old Jul 28, 2012 | 05:08 PM
  #16  
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QwkTrip
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Originally Posted by stephen.osborne1
You should never go below about 1/4 tank to begin with... It will cause your fuel pump to cavitate (suck in air) and shorten its life span drastically.
You're just making stuff up. I agree it is a good habit to give yourself wide margin and not intentionally run low on fuel, though.
 
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Old Jul 28, 2012 | 11:48 PM
  #17  
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Gary Atsma
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Originally Posted by QwkTrip
You're just making stuff up. I agree it is a good habit to give yourself wide margin and not intentionally run low on fuel, though.
He's actually right, to a point. It won't really do it at 1/4 tank, but much below that there WILL be times when the pump WILL suck air, which IS NOT conducive to long pump life. The times when it will do it is during bumpy driving, steep hills(up AND down), and, of course, when you are just about out. So, no, he is NOT making stuff up. You just wish he was.....
 
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Old Jul 29, 2012 | 12:10 AM
  #18  
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It's not so much about it sucking air, but the pump is cooled by the fuel around it. So if the fuel is really low the pump not only cavitates but runs hot too
 
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Old Jul 29, 2012 | 12:13 AM
  #19  
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Gary Atsma
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Originally Posted by TheWhiteBeast
It's not so much about it sucking air, but the pump is cooled by the fuel around it. So if the fuel is really low the pump not only cavitates but runs hot too
Yup, thought about that AFTER I made the post. Must be getting old..... or it's getting late (10:12PM).... or (gulp) BOTH......
 
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Old Jul 29, 2012 | 12:36 AM
  #20  
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QwkTrip
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Originally Posted by Gary Atsma
So, no, he is NOT making stuff up. You just wish he was.....
I understand the problems when pump pulls air and I'm not debating that's a bad thing. Choosing to say it happens at 1/4 tank is the made up part. You just wish it wasn't.....

On that same thought, it would be neat info if somebody could show a cross-section of the various fuel tanks and how the pump is located and level of fuel at various fills. What fuel level is "too low" will always be a guessing game until useful data is put on the table. And I think most everybody here is genuinely interested to know the correct answer to avoid problems.
 
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Old Jul 29, 2012 | 08:53 AM
  #21  
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Gary Atsma
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From: Hanford, Cali
Originally Posted by QwkTrip
I understand the problems when pump pulls air and I'm not debating that's a bad thing. Choosing to say it happens at 1/4 tank is the made up part. You just wish it wasn't.....
AAAAGGHH! Ya got me! With my own weapon! But you do make a good point, of course. Knowing when you are at the "problematic" stage of running low is a guessing game at best because of all the variables in fuel tank design, for which there are no solid answers, unfortunately.
But we did have a little fun with it...
 
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Old Jul 29, 2012 | 10:08 AM
  #22  
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Well played and good natured reply.
 
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Old Jul 29, 2012 | 07:33 PM
  #23  
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From: Missouri
funny story

The day I picked my 2010 up at dealer the saleman told me to go out and drive it while he got the paperwork set up with closer. It was sitting on level ground and I noticed it said "0" miles remaining and the gauge was on "low empty". I went back in and told him and he got in with me and went and filled it up and the station was 3 miles away- anyway we did not run out of gas.

Oldstuff
 
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Old Jul 29, 2012 | 11:27 PM
  #24  
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flixden
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Originally Posted by TheWhiteBeast
It's not so much about it sucking air, but the pump is cooled by the fuel around it. So if the fuel is really low the pump not only cavitates but runs hot too
I am sure the vast majority of the cooling comes from the fuel running through the pump, not the fuel surrounding it. Fuel running through has a MUCH higher cooling effect than the fuel surrounding the pump. Running out of fuel on a regular basis is of course different. I am sure it is absolutely safe for the pump to run the tank down until the low fuel indicator comes on. That's when I usually look for the next gas station, unless I am in the middle of nowhere - then I start looking earlier. Yeah, you don't want to let the fuel pump suck air too often, but I think a quarter tank is way overkill.
 
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Old Jul 29, 2012 | 11:30 PM
  #25  
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Originally Posted by King Ranch
My truck was low on fuel today, it changed from being parked on a hill to parking back on level groud so the manual is wrong. it seems to be running off of how much fuel it thinks is still in the tank???
LOL, of course it is running off of how much fuel it thinks is still in the tank. That's just not enough information to be able to calculate DTE, the system also needs some sort of consumption value to use. And that's from the average consumption during the last 500 miles - according to Ford.
 
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Old Jul 30, 2012 | 04:45 PM
  #26  
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From: Lenexa, KS
Originally Posted by NASSTY
I read on another forum that somebody drove 25 miles after the screen said 0 miles to E.
I've done about that a few times in my 07 Expy. I fill up on the MO side of the state line when I am downtown at work. Sometimes I miscalculate and end up close to 0 miles on my trip to work. Pretty sure my Expy has 2 gallons left in the tank when it hits zero.
 
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Old Jul 30, 2012 | 08:07 PM
  #27  
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With the way gas prices are boomeranging these days I top off my tank based on the prices I see at the stations. If I can save 7 cents a gallon and only need a quarter tank I'm there.
 
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Old Jul 30, 2012 | 11:36 PM
  #28  
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I think filling up or not based on gas prices is like betting on the stock market - which in fact is like gambling.
So I never really look how much it is - I will buy the gas anyway. I drive until the light comes on - then I fill her up. Most of the time in two transactions as the pump shuts off at $100, and that won't fill up my 36 gal tank!
 
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Old Jul 30, 2012 | 11:53 PM
  #29  
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Originally Posted by flixden
I think filling up or not based on gas prices is like betting on the stock market - which in fact is like gambling.
Huh??? Price is posted and he knows exactly what he's paying. It might seem inconvenient to a lot of people but it is as much gambling as buying a quart of milk at the grocery. Or does the dairy aisle make you nervous, too?

By the way, just owning a stock isn't gambling either. Companies issue stocks to raise money needed to sustain and grow the business. When you own a share of stock, you are part owner of the company and have a claim on every asset and earnings. The value of your share of stock is tied to the value of the company. Your behavior and attitude is what determines if you're a gambler or not and people can turn almost anything into gambling if they want. Some people do gamble on stocks trying to turn a profit, but most people in the stock market are investors.
 
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Old Jul 31, 2012 | 12:41 AM
  #30  
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flixden
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Originally Posted by QwkTrip
Huh??? Price is posted and he knows exactly what he's paying. It might seem inconvenient to a lot of people but it is as much gambling as buying a quart of milk at the grocery. Or does the dairy aisle make you nervous, too?

By the way, owning a stock isn't gambling either. Companies issue stocks to raise money needed to sustain and grow the business. When you own a share of stock, you are part owner of the company and have a claim on every asset and earnings. The value of your share of stock is tied to the value of the company. Of course, just like anything in life, you can turn it into gambling by misusing it. But that doesn't make everybody in the stock market a gambler.
I don't think you understood what I said.
 
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