Fuel tank capacity

[Jesusisgod]

I Googled what 5 gallons of additional fuel means in the vehicle equipment. Saw it posted here in 2020 that it was 5 gallons added for delivery to dealer. I have a 23 gallon tank per window sticker.

The amount at the pump compared to how much I supposedly had left according to the fuel gauge never added up to me.

So I decided to test it with something I knew exactly what it held.

I have 6, 20 liter wavien Jerry cans. 20 liters is 5.28 gallons. I filled these cans up at a fueI station each at exactly 5.28 gallons. Logging the amount with each can. 6 x 5.28 is 31.68. I used the fill nozzle that comes with the cans. For those that don't know. It'll not let the tank over fill.

I preformed 3 separate tests.

1st test: I took 5 Jerry cans with 5.28 gallons each. When I got down to a qtr tank I decided to fill. I estimated I had roughly 5.75 gallons left. To my surprise at a qtr tank it took 4 full cans, and left only 2 gallons in the 5th. Now simple math says that's. Close to 29+ gallons.

I didn't want to make any assumptions. I simply logged the numbers and decided I needed to do a more accurate test.

2nd test: I ran the truck to empty, I didn't let it run out and die. I let it get to empty or as close to 0 gas as I felt comfortable with. Not good to let a fuel pump run dry. I took all 6 Jerry cans. Again it took 5 full cans(5.28 x 5 = 26.4) it also took about half (2.39 gallons) of the 6th can. 2.89 is how much was left. For a total of 28.79 gallons.

Sure some of that could be in the fill tube. Not 5 gallons worth. At best a qtr of a gallon is gonna fit between the Jerry can nozzle shut off, and the tank.

OK whut?

3rd test. At home I have a 60 gallon transfer tank. It has a digital gallon meter. Just like the pumps at a fuel station. I ran the truck to empty again. As far as I could before I felt the pump might run dry. I use the transfer tank to fill. Again it's just like the pumps at the local station. Automatic shut off etc. It filled the truck to 28.59.

Unless I'm missing something here 23 is actually 28-30 gallons. I'm aware they do not offer a 30 gallon tank. It's not a 33 gallon tank. Per the vehicle equipment list it's a 23. So either that 5 extra gallon thing on the vehicle equipment is a capacity of 5 gallons more, and not 5 gallons in the tank when shipped. Or I got a plus size tank labeled as a 23 gallon.

 

[SD Rebel]

I Googled what 5 gallons of additional fuel means in the vehicle equipment. Saw it posted here in 2020 that it was 5 gallons added for delivery to dealer. I have a 23 gallon tank per window sticker.

I have 5, 20 liter wavien Jerry cans. 5.28 gallons. I used the fill nozzle that comes with the cans. For those that don't know. It'll not let the tank over fill.

I ran the truck down to a qtr of a tank. Was able to get 4 cans, and 1/2 of the 5th can into the tank. So that means at a qtr of a tank. Plus 23.76 gallons, these tanks are 28 gallons.

Now to further the test I got a 6th Jerry can. Ran the truck to as close to empty as I felt comfortable. It took 5 full cans and 1/2 of the 6th. Technically 3/4 cause it does fill tube up to where the Jerry can nozzle is inserted. So again that's at least 29 gallons. - what the fill tube held.

Unless I'm missing something here 23 is actually 30 gallons.

I think the tank capacity is pretty accurate, 23 should not mean 30. Most people complain their tanks seems smaller than advertised. There is a miscalculation somewhere. Or the window sticker is wrong. Double check your build sheet to confirm tank size, which you can download from the Mopar site with your vin, link to the site: FCA RAM

 

[Jesusisgod]

I think the tank capacity is pretty accurate, 23 should not mean 30. Most people complain their tanks seems smaller than advertised. There is a miscalculation somewhere. Or the window sticker is wrong. Double check your build sheet to confirm tank size, which you can download from the Mopar site with your vin, link to the site: FCA RAM

Definitely isn't a miscalculation. Measure twice cut once. I logged the gallons at the pump to fill the cans. Which is also why I did the 2nd test thinking maybe a qtr of a tank isn't 5.75 gallons. Then the 3rd test to confirm those findings with a digital measurement.

Problem could be the fill tubes on these trucks suck? I've heard they cut off when there is still 4-5 gallons left to fill.

5 empty Jerry cans. 1 in the truck. Ignore the red one it's for 2 cycle.

 

[SD Rebel]

Gotcha, what about the fuel estimate before you filled up, you based it on the fuel gauge position?

If there is no miscalculation, they you have to have the wrong size tank at least stated on your window sticker.

In wonder if there is a decal or label on the fuel cell you can confirm with?

 

[bigdodge]

did you buy new?

 

[PurpleRT]

5 additional gallons of gas I believe is around what they usually come off the transport truck with sometimes even less depending on if its been running or transported further.

You can get underneath the truck and take a good picture of the tank. The difference between the three tank sizes is pretty noticeable.


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[Jesusisgod]

Gotcha, what about the fuel estimate before you filled up, you based it on the fuel gauge position?

If there is no miscalculation, they you have to have the wrong size tank at least stated on your window sticker.

In wonder if there is a decal or label on the fuel cell you can confirm with?

Hmm didn't think to look. Ill look when it's not raining see if I can see the part number.

Yes I'm going off the gauge. That's another reason as to why I did the second test going to empty. Cause I can only guess a qtr tank is 5.75 gallons. 20l being 5.28 gallons. 5 cans is 26.4. Then the 6th can with only 2 gallons left in it brings it to 29 gallons (29.4).thats was with the gauge on empty.

 

[Jesusisgod]

5 additional gallons of gas I believe is around what they usually come off the transport truck with sometimes even less depending on if its been running or transported further.

You can get underneath the truck and take a good picture of the tank. The difference between the three tank sizes is pretty noticeable.


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I'll do that when it's not raining. Regardless of tank size. It is holding right now at least 29 gallons. When it's supposed to be a 23 gallon tank.

Unless the pump at the station was wrong, and the Jerry cans are not truly 20L. Almost 6 cans going into the tank is 29+ gallons.

 

[PurpleRT]

Did you purchase new or used?

If used.. it could have been swapped to the bigger tank.. its been a few years since I did the swap but I remembered the size of the tank being marked on the tank itself but I dont remember if it would have been viewable once installed.


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[Jesusisgod]

Did you purchase new or used?

If used.. it could have been swapped to the bigger tank.. its been a few years since I did the swap but I remembered the size of the tank being marked on the tank itself but I dont remember if it would have been viewable once installed.


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New only had 12 miles on it when I got it.

 

[Insanity]

Just curious as to the reason for the Jerry cans? Also did you option a package that added a 33 gallon tank that is not listed?

 

[Jesusisgod]

Just curious as to the reason for the Jerry cans? Also did you option a package that added a 33 gallon tank that is not listed?

Not that I'm aware of. That Pic is from the package options straight from the ram app. Even on the window sticker it says 23 gallon.

I got a mini fuel station I built with a transfer tank. That's how I fill it. The job I work i also gotta have multiple cans to fill the owners equipment up. He has a fuel cabinet so I take mine fill up his cans, then fill up his equipment. He doesn't want a pump scared of lightning hitting it.

 

[Rock Crawler]

In wonder if there is a decal or label on the fuel cell you can confirm with?

The tank size is molded into the rear of the tank. I have the 33 gallon and it says 33G.

 

[PurpleRT]

^ Bingo there you go , couldn’t remember where it was.


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[SD Rebel]

The tank size is molded into the rear of the tank. I have the 33 gallon and it says 33G.

View attachment 196380

Awesome, thanks for posting! The OP should be able to confirm now, can't wait to see what he finds out.

 

[Rock Crawler]

As far as I know, Ram offers three tank sizes 23, 26, and 33. It all comes down to which truck package you have.

 

[HSKR R/T]

I Googled what 5 gallons of additional fuel means in the vehicle equipment. Saw it posted here in 2020 that it was 5 gallons added for delivery to dealer. I have a 23 gallon tank per window sticker.

I have 5, 20 liter wavien Jerry cans. 5.28 gallons. I used the fill nozzle that comes with the cans. For those that don't know. It'll not let the tank over fill.

I ran the truck down to a qtr of a tank. Was able to get 4 cans, and 1/2 of the 5th can into the tank. So that means at a qtr of a tank. Plus 23.76 gallons, these tanks are 28 gallons.

Now to further the test I got a 6th Jerry can. Ran the truck to as close to empty as I felt comfortable. It took 5 full cans and 1/2 of the 6th. Technically 3/4 cause it does fill tube up to where the Jerry can nozzle is inserted. So again that's at least 29 gallons. - what the fill tube held.

Unless I'm missing something here 23 is actually 30 gallons.

You are asking to cause issues with fill your fuel tank later on by filling up the fill tube to the Jerry can nozzle.

There is no 30 gallon tank. And your methods are not accurate at all. Fill up at fuel pumps only. Unless you run out of gas and can't make it to fuel pump

 

[Rock Crawler]

As HSKR mentioned, your method is not going to be accurate. The gauge/computer is not that precise when it comes to fuel levels. So when you say you drove it down to 1/4 tank, how will you know exactly how much fuel is really left? There is a guy online that tested his F-150 to see how far he could drive once his truck said he had zero miles left until empty. He was able to drive 49 additional miles before the truck died. That’s a lot of extra fuel. The tank should say what size it is. If you don’t trust that, then drive the truck until it dies, then fill it up and see how much goes in. If you are using Jerry Cans, don’t fill them all the way. Fill to exactly 5 gallons based on what the fuel pump tells you is actually 5 gallons, not the fill line on the can.

 

[Trooper4]

I Googled what 5 gallons of additional fuel means in the vehicle equipment. Saw it posted here in 2020 that it was 5 gallons added for delivery to dealer. I have a 23 gallon tank per window sticker.

I have 5, 20 liter wavien Jerry cans. 5.28 gallons. I used the fill nozzle that comes with the cans. For those that don't know. It'll not let the tank over fill.

I ran the truck down to a qtr of a tank. Was able to get 4 cans, and 1/2 of the 5th can into the tank. So that means at a qtr of a tank. Plus 23.76 gallons, these tanks are 28 gallons.

Now to further the test I got a 6th Jerry can. Ran the truck to as close to empty as I felt comfortable. It took 5 full cans and 1/2 of the 6th. Technically 3/4 cause it does fill tube up to where the Jerry can nozzle is inserted. So again that's at least 29 gallons. - what the fill tube held.

Unless I'm missing something here 23 is actually 30 gallons.

Never trust a fuel gauge. 1/4 tank on the gauge means nothing. If you want a semi accurate number, carry six 5gal cans and run it dry, then fill it and see what it takes.

 

[HSKR R/T]

Never trust a fuel gauge. 1/4 tank on the gauge means nothing. If you want a semi accurate number, carry six 5gal cans and run it dry, then fill it and see what it takes.

This still isn't accurate because you will always be able to get more fuel in the tank, filling from cans, than it's designed to hold, when you fill from a fuel pump. You aren't supposed to get fuel all the way up into the fuel fill neck. He is overfilling his tank, which will cause issues down the road, when he needs to refuel at a gas station