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Fuel tank, first half go further than the second half?

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Old Feb 22, 2006 | 12:34 AM
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Default Fuel tank, first half go further than the second half?

I have to admit I have never done my own research but I could swear the first half tank of fuel goes further than the second. Has anyone researched this (other than my uncles friend says…)?

Thanks in advance!
Old Feb 22, 2006 | 12:35 AM
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yes...the first goes farther then the second...and do not type if big blue font
Old Feb 22, 2006 | 12:47 AM
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First car?

Every car I have ever owned was like that...
Old Feb 22, 2006 | 12:51 AM
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When you full up the tank the needle will go pass the full tank indicator. Not only that but there is also fuel in the fuel lines and throughout the system.
Old Feb 22, 2006 | 12:52 AM
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I have only filled one tank so far. Looked like I was at the 175-200 by the half mark, I was at 240 by 3/4. Fuel gauges are not that accurate.
Old Feb 22, 2006 | 01:04 AM
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just fill it up pay the man and be glad that when you step on the gas hard the needle doesn't move with every launch or burnout....
Old Feb 22, 2006 | 01:31 AM
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The first half holds six gallons, so does the second but the empty mark stops at ten gallons, that is why you have almost two gallons of "reserve" after empty... At 29.3 mpg in the city, who's complaining???
Old Feb 22, 2006 | 02:04 AM
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It's been my experience that in most vehicles that when you fill them up, full doesn't accurate reflect the additional fuel that is in the fuel filler pipe. Also, on a lot of vehicles they put the "Empty" mark above the actual empty line for those of us that like to ride the tank all the way to the empty mark and beyond. Because of this it appears that you get way more milage on the first half of the tank than the second. xBs may not be the same, but that would be my best guess that they are.
Old Feb 22, 2006 | 03:49 AM
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I have owned 14 vehicles and all of them have been like that so I think all cars are like that...
Old Feb 22, 2006 | 04:04 AM
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i m glad i even have a gas gauge, on my last car it broke well over a year b4 i stopped driving it, boy m i glad those audis have tripmeters and the gas lite still worked
Old Feb 22, 2006 | 08:22 AM
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Yes, they indeed design them like that. It makes you think you are getting better MPG than you are. Just don't try to fill it more than a few cents after it clicks and your charcoal filter and wallet will thank you. Also check MPG's over 3 tankfulls instead of every one. You'll get a more accurate reading.
Old Feb 24, 2006 | 02:57 AM
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no its not the fuel in the line or anything of the sort its the way the sender is designed and is in all cars as far as i kow
http://auto.howstuffworks.com/fuel-gauge2.htm

be sure to click play on the flash animation
Old Feb 27, 2006 | 03:26 AM
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Originally Posted by jethro_b
Yes, they indeed design them like that. It makes you think you are getting better MPG than you are. Just don't try to fill it more than a few cents after it clicks and your charcoal filter and wallet will thank you. Also check MPG's over 3 tankfulls instead of every one. You'll get a more accurate reading.
MPG consipracy theories, wow. This whole thread could have been answered with a quick google search and all this random speculation and insane opinions could have been avoided...

http://auto.howstuffworks.com/fuel-gauge1.htm

Please people, if you don't know the right answer don't pretend, just research it yourself or move on. There's no reason to spread misinformation all over the place because you want to believe some hyped up theory.
Old Feb 27, 2006 | 04:18 AM
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Wow, so why didn't the automakers correct the design flaw so the guage would match the tank when it is half -full??? Because they didn't want to. They like people to think they get to go farther for less. It makes them feel better about their vehicle.
It isn't a theory. It's a fact. At least it's been this way with all of my 50 plus cars I've owned over the years.
Old Feb 27, 2006 | 06:25 AM
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They don't correct the "design flaw" because nobody is so delusional to think that a gas gauge that lingers on full for awhile is a full blown mind control device thought up after years of research in conjuction with the oil companies while throwing kickbacks at the EPA to keep this bastardly equipment under wraps. They don't correct the "design flaw" because a device that is accurate to the milliliter to the driver is totally worthless to 100% of new cars sold to the general public and probably costs 10x as much and is 10x as complicated to repair.

This is like asking why the automakers don't correct that silly design flaw where speedometers don't register under 10mph. You know, they do that so people with automatics don't think they are moving when the car is in gear and they let their foot off the brake. After all the gauge still says 0! The automakers are just trying to keep us in the dark because we can't possibly come to any rational conclusions ourselves. =\
Old Feb 28, 2006 | 12:09 AM
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On the last tank I got 20 miles less on the last half than I did on the first half.

I will continue to clock the mileage between the first half and the last half and see if I can make the spread a little more accurate
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