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Usable gallons in a 2019?

1147 Views 19 Replies 8 Participants Last post by  gregoryx
In my 2019 tall/long 250 van w/ a 3.7 engine, if I refuel at 0 "miles to go" I can add a tad over 23 gallons to the 26 gallon tank. I'd like to know if anyone has added more than that. Without running out of gas, lol. Basically I want to know how far past 0 "miles to go" I can go.

My miles to go indicator is of limited use as it initially overshoots the actual miles to go when the tank is full (decreases slower than actual miles accumulate) and then undershoots as the tank gets close to empty (decreases faster than actual miles).

FWIW, accounting for the actual mpg from the current tank, when the "50 miles till empty" light comes on, I have used 20.7 gallons from the current tank. I calc mpg the old fashioned way as my mpg indicator is useless since it never varies outside 13-15 mpg tho my actual mileage varies 12-19 mpg.
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That 50 miles to empty will trick you in western NC. I never let mine get that low. When you go up a steep hill all the gas flows to the back of the tank.
Many people say it will damage the tank mounted fuel pump running it so low so I fill mine when it gets to a 1/4 tank.
Running out of gas is embarrassing, You look like some kid who does not know any better or else somebody who is always broke.
If you run out of gas and need to fill the tank from a gas can, BE SURE you have the white fuel funnel as it is needed to open up the hidden trap door that goes to the fuel tank, Just placing the nozzle from the gas into the front trap door will just end up with your gas on the ground.
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That 50 miles to empty will trick you in western NC. I never let mine get that low. When you go up a steep hill all the gas flows to the back of the tank.
i learned this right after i bought mine. my driveway is a little steep and i usually back in...well with "40 miles" to empty i "ran out of gas" in the driveway with the rear higher than the front.

fortunately i just had to roll down the short driveway to get it to start
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If you run out of gas and need to fill the tank from a gas can, BE SURE you have the white fuel funnel as it is needed to open up the hidden trap door that goes to the fuel tank, Just placing the nozzle from the gas into the front trap door will just end up with your gas on the ground.
I've never used it and don't spill a drop when I fill up from my jerry cans. I really need to stop carrying it around.
I've never used it and don't spill a drop when I fill up from my jerry cans. I really need to stop carrying it around.
We found that the new cans ("storage containers"?) worked without the shewee. Which is what we thought that was when we first saw it in the glove-box.

We, also, went from 25 miles to go to unable to start the van when on a hill. Lesson learned.

This, "how much fuel does the tank hold," has been discussed a couple times. We've got the 31-gallon (2020+) tank and I have put over 30 gallons in it a couple times. But not often. Never sure if the gauge just doesn't show the same all the time or what... 🤔
thx gang. I often drive long stretches of open road out west and in canada. On the Alaskan highway in the yukon right now. Just trying to find out how much fuel I have to work with. When you get 13 mpg the stock tank is a bad joke. First vehicle I've ever had to lower my speed, to get better mpg, to make it btwn fuel stops.
...

This, "how much fuel does the tank hold," has been discussed a couple times. We've got the 31-gallon (2020+) tank and I have put over 30 gallons in it a couple times. But not often. Never sure if the gauge just doesn't show the same all the time or what... 🤔
I've not a definitive answer on the 25 (26?) gal tank.
I've not a definitive answer on the 25 (26?) gal tank.
It's supposed to be 26, right? I've had vehicles that were always optimistic or even accurate... but this one is a little schizophrenic. In the Sprinter, full-on below-the-empty-mark was still 40+ miles. They /really/ didn't want you to run it out of fuel. But I've run the Transit out 2-3 times. One was a C19 situation - that point where all the supposedly open stations were no longer open. Others were just parked on a hill and wouldn't start after turning off - needed a gallon to overcome the tank angle. But I don't trust it to go more than 10-15 miles after signalling empty. So... rarely putting 30 gallons in it. Typical fill from nearly-empty is ~25-27 gallons.
"Miles to empty" is the computers guess based on YOUR past driving history.
Mildly interesting fill-up just happened: Van was less than 50 miles to go on our 31 gallon tank. Fuel pump shut off at 18. Hm. No, that's not right. Let it sit for a bit, took a little bit more. Started the engine to see where the gauge was - not full. I think starting it changed something: slowly added more fuel - ultimately stopping on the high end of 26 gallons. Weird. Pump really thought it was finished. But there were 8 more gallons to go. 🤔
Not venting properly.
Not venting properly.
Ya, my boat does that when it is super low and I start to refuel, kicks off a lot till I get 20-40 gal in it.
"Miles to empty" is the computers guess based on YOUR past driving history.
Can you tell my how you know that? The 50 miles light in my 2016 w/ 25g tank comes on at 20.7 +/- 0.1 gal reliably. I'd of guessed that the computer is just turning on the light when the volts from the fuel sender reach a certain value. But being a transit, I'd not be surprised if there was some over complicated algorithm trying to out smart the world and thereby confusing everyone with its apparent randomness, a' la the interior lights.
Not venting properly.
Sure. That's it. And then the venting repairs itself at the next fill-up. Nothing to do with the pump. 😜

Can you tell my how you know that? The 50 miles light in my 2016 w/ 25g tank comes on at 20.7 +/- 0.1 gal reliably. I'd of guessed that the computer is just turning on the light when the volts from the fuel sender reach a certain value. But being a transit, I'd not be surprised if there was some over complicated algorithm trying to out smart the world and thereby confusing everyone with its apparent randomness, a' la the interior lights.
Pretty sure @pbethel is wrong about the distance-to-empty estimates being fancy. Nothing that fancy / complicated from what I've observed: from what I can tell, it's taking the current average fuel economy and that's it. FWIW, I can't tell if it's using any of the averages I can see on the computer. I wouldn't be surprised if it's only averaging the last 50 miles or something like that.
I dont know, I have not reset my odometer since 2016 and I am averaging 16.7 mpg.
It was said by many in the past that resetting your odometer changes your averages.
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Sure. That's it. And then the venting repairs itself at the next fill-up. Nothing to do with the pump. 😜
Pump pumping very fast overwhelming the vent system.

Pretty sure @pbethel is wrong about the distance-to-empty estimates being fancy. Nothing that fancy / complicated from what I've observed: from what I can tell, it's taking the current average fuel economy and that's it. FWIW, I can't tell if it's using any of the averages I can see on the computer. I wouldn't be surprised if it's only averaging the last 50 miles or something like that.
When I use mine as a daily driver It gives me the warning with more in the tank than when I am on road trips and averaging much better mileage.
Nothing fancy. It just knows how many miles per gallon your getting and from that estimates miles to empty.
But maybe mine just has a glitch and gives random readings that fooled me into believing what I do. Been wrong before. And you never fail to educate me.
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When I use mine as a daily driver It gives me the warning with more in the tank than when I am on road trips and averaging much better mileage.
Nothing fancy. It just knows how many miles per gallon your getting and from that estimates miles to empty.
But maybe mine just has a glitch and gives random readings that fooled me into believing what I do. Been wrong before. And you never fail to educate me.
Another of those topics - like the transmission modes - that we're all just gonna have to guess about, I suppose. It certainly has some connection to our actual driving habits - not just optimistic.
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Just put a thousand miles on. Played with the distance-to-empty thing a bit. It doesn't re-index immediately when resetting any of the three options (at least in our 2020). Those three are the two trip meter things and the fuel efficiency thing.

The two trip meter distance-to-empty indicators remain the same even when I reset the trip distance and fuel efficiency at very different times. But resetting them does cause it to reindex over a short-ish period of time - whereas NOT resetting them remains what it was previously - so cumulative of one or the other trip-meter, I guess?

There's /some/ relationship there... but it was not clear if it's one or the other (or both somehow) affecting the distance-to-empty.

Alas... so much for trying to get an answer... 🤷‍♀️
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