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Everywhere I look it tells me that the Fuel tank is 14 Gal. but I the most I have be able to put in from empty is 11.5 Gal.

I put 5K miles on it in 6 weeks so I have filled up a few times and thought that the computer would have learned what it is by now. I have let it get to 5 Miles before empty a few times as well.

I was thinking of taking it in to have them look at it but I thought Id see if anyone ells is seeing this. I know it wont go to full empty but 2.5 Gal left at 0 seems like a lot..
 

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i have gone lower than that, it said refuel, and drove that for a day. then added 1 gallon, and drove someplace else for cheaper gas, and still took only 12 gallons and a little extra. still haven't figured it out yet. thinking of the next time, i'll bring it in the shop and hook the tech stream to it and see what the sensor says.
 

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Yeah, I agree.

I've filled up from E about 5 times since I bought the car (less than a month ago), and I've barely went over 1000 miles. Most of my driving is highway too. I was pretty confused as to why my car drank so much.

Sidenote:
I've conducted my own un-official research study on mpg. Ill make a separate post later!
 

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Avoid letting it go right down to E, doing that often can be bad for your fuel pump since fuel acts as a lubricant for the system. Much like what your oil does to the engine. Best to play it safe.

I don't let gas go any lower than 1/4 tank, that's when I fill up.
 

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Avoid letting it go right down to E, doing that often can be bad for your fuel pump since fuel acts as a lubricant for the system. Much like what your oil does to the engine. Best to play it safe.

I don't let gas go any lower than 1/4 tank, that's when I fill up.
didn't know that. thanks for the heads up dude!
 

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usually there's about a two gallon reserve once the gauge hits E/the light comes on. I took it way down on the first tank to test the theory, and it took 12 gallons to fill, so the theory stands so far.
 

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usually there's about a two gallon reserve once the gauge hits E/the light comes on. I took it way down on the first tank to test the theory, and it took 12 gallons to fill, so the theory stands so far.
Your low fuel light will start coming on with 8L (2.1gal) of gas in the tank. If at this point your on board computer says 0 to empty that means it's just programmed to say that at this point. I think that the best way to judge how much gas you have left in the tank is to drive until your low fuel light comes on, then go to the gas station, fill it up and look how much you actually put in the tank (the tank size is 53L or 11.65gal - specs posted on scion.ca). Do this a few times and you will have a very good idea about what the accuracy of your on board computer is and your fuel consumption.

Low fuel light starts to come on with 8L of gas in the tank on straight level road.
 

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The 'empty' reserve varies a lot by car. In a Malibu I could drive a 100K before it would actually become a problem, for instance. Judging by how quickly it starts dropping from full and what I put in without having to sort of 'tread the needle' I always figured the reserve was sizeable.

As for the lubrification of the fuel pump, It's more of a matter of not running out of fuel. If it's pumping air, sure, you have a problem, but it's unlikely that will happen from just running under a quarter of the tank or empty, even. I'd be more concerned with the factory oil change interval being this ridiculously high if I were you.
 
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