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38 Gal tank experiences....

Discussion in '2.5 Gen Tundras (2014-2021)' started by KeithM, Mar 19, 2018.

  1. May 7, 2021 at 7:15 AM
    #451
    CurtisLemansky

    CurtisLemansky 5.7 or Die

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    Interesting. Does it take that every time now or just the one time?
     
  2. May 7, 2021 at 8:55 AM
    #452
    Yota303

    Yota303 New Member

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    You are correct I’m not sure where I came up with the 30 gal tank I thought I remembered reading it in the owner’s manual when I first got the truck, I’m assuming I have the 38 gallon tank as I have put 30 gallons in it at its lowest point that I’ve driven it to, good advice through all of this to calculate mileage manually especially while towing etc. also good to know there’s a little more of a buffer from when the low fuel light comes on to when the tank is actually empty.
     
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  3. May 7, 2021 at 9:28 AM
    #453
    Netmonkey

    Netmonkey Don't be a Dumbass

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    Technology is great, but it has made us forget how or why do things. My first car was a 1979 oldsmobile delta 88. It did not have a distance to empty display or a mpg display. Hell, it did not even have a low fuel light. I had to pay attention to the needle on the fuel gauge. I had to learn how much fuel that I had left (or how many more miles that I could travel) by how far the needle was over the "E". And I did that by hand calculating the mileage and using the odometer (This car did not even have a trip odometer). I did this hand calculation process with every vehicle that I have owned since. When I purchased the Tundra, I still hand calculated the mileage to verify those displays. I found that those displays were cool, but not 100% accurate. For me, the MPG display shows about 1-2mpg better than what I am actually getting. Also, the DTE display goes to zero way before I am out of fuel. I am sure the larger tires have also thrown those displays off.
     
    Last edited: May 11, 2021
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  4. May 7, 2021 at 11:28 AM
    #454
    Rodtheviking

    Rodtheviking New Member

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    2017 Limited Crew TRD, Ironman Pros with JBA uppers. Prinsu rack. Lomax Tri-fold.
    Twice now, just filled and it was 34ish.
     
  5. May 11, 2021 at 12:39 PM
    #455
    java230

    java230 New Member

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    I put 32.2 in mine.... That was when the light just said refuel. And my CC maxed out so it may have been a little more.
     
  6. May 11, 2021 at 1:01 PM
    #456
    Dan_Gleesac14

    Dan_Gleesac14 New Member

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    sounds about right. i've only ever gotten to fill my truck up to just under 31gal since I've owned it.
     
  7. May 12, 2021 at 7:56 AM
    #457
    Boerseun

    Boerseun Super White

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    Hand calculations can be far off also. Especially when you are down to the last little bit of gas (or last few miles, whichever way you look at it.) What do you use for MPG? It's a guess since you have no idea what MPG you will be getting those last 10 miles - you run into a traffic jam and stop-go conditions your MPG drops to 5 MPG and your calcs are not even close, while the computer will be recalculating as you go.

    Bottom line, it is not possible to be 100% accurate, no matter how it is calculated, since there are way too many variables. Due to the size of the tank (actual length) when you are on a steep incline the amount of usable fuel will be a lot less than when you are on a flat surface. That alone will throw any calculation, manual or computer, completely out the door.
     
  8. May 12, 2021 at 8:26 AM
    #458
    Netmonkey

    Netmonkey Don't be a Dumbass

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    o_O

    Hand calculations are damn near close to exact. If I drive 400 miles and put 30 gallons into the tank to fill it, then that is 400/30=13.33 mpg. It doesn't get much easier than that. Hand calculations show your mpg for the previous tank. It does not show your current mpg. However, I have done the hand calculations based on the different driving conditions. For example (in my Tundra), I know that if all the miles are highway miles, then I am getting around 15mpg. If the miles are city miles, then I am getting about 13mpg. If the miles are towing a travel trailer, then I am getting about 8mpg. I won't know the exact mpg in that condition until I full up the tank again, but I have a very close approximation based on previous fill ups. This hand calculated projection is more accurate than the truck's DTE or MPG displays.
     
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  9. May 12, 2021 at 8:40 AM
    #459
    The Towse Tundra 2.0

    The Towse Tundra 2.0 New Member

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    I filled up my tank yesterday and put 31 gallons in. My needle was just above the empty line without the gas light on. That would imply 7 gallons till totally empty at 12 mpg. That’ll give me about 85 miles left to drive. It seems accurate to me and I believe that’s what my dash indicated as well.
     
  10. May 12, 2021 at 9:22 AM
    #460
    CurtisLemansky

    CurtisLemansky 5.7 or Die

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    I pulled up my fuel level gauge on OBDLINK the last time I hit Low Fuel (0 Miles) and it was around 6-7 gal left.
     
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  11. May 12, 2021 at 10:45 AM
    #461
    Boerseun

    Boerseun Super White

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    After the fact is accurate, but the response was on the discussion about remaining fuel and remaining DTE at any time. The computer keeps updating the DTE as you go; even if not 100% accurate, it gives an idea. Hand calculation can only be done after the fact when you fill up. While accurate, it does not help you when you are trying to determine how much further you can go before filling up.

    Not a big deal, just saying.
     
  12. May 12, 2021 at 10:54 AM
    #462
    Netmonkey

    Netmonkey Don't be a Dumbass

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    I think that we are close to agreement here. However, I think that my current tank estimations (based on previous hand calculation history) are more accurate than the DTE and MPG displays. The DTE display goes to zero way before your are actually out of fuel.
     
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  13. May 13, 2021 at 6:01 AM
    #463
    Jaypown

    Jaypown New Member

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    Just to add on to your guys' discussion, a good point to mention is how the DTE only goes down and does not adjust. Say the first half of your tank is towing and you're burning through your gas and DTE is dropping. You drop off the trailer and jump on the highway at 65mph and cruise. DTE will adjust and begin to decrease at a slower rate. But it never goes up. My wifes accord will recognize the change in driving and increase. I'll fill up the tank and it'll show mid 400's DTE and jump on the highway and cruise easily and it'll increase to high 500's.

    Hand calculations will still show my average for the tank and be very accurate but I won't know individually the mpg on different driving habits on that tank.
     
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  14. May 14, 2021 at 5:10 AM
    #464
    nmjameswilson

    nmjameswilson New Member

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    I just bought a 2021 Limited a couple weeks ago and it takes 30 gallons. I received a warning that I had low fuel with THREE MILES TO EMPTY. I went another 9 miles and was fine.
    Does anyone know how to change the low fuel alert to something higher?

    I am going to disconnect the battery and see if that helps as described above.
     
  15. May 14, 2021 at 5:55 AM
    #465
    Jbehredt

    Jbehredt Burgeoning member

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    The one that gives me a reason to be upset of course!
     
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  16. Jun 16, 2021 at 1:23 PM
    #466
    LarryDangerfield

    LarryDangerfield New Member

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    Stock....for now.
    This did not age well
     
  17. Jun 17, 2021 at 8:25 AM
    #467
    t-rey1

    t-rey1 New Member

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    15mi to empty only took 30 gallons and $80. Got 500mi out of the tank
     
  18. Jun 17, 2021 at 8:40 AM
    #468
    BrakeDust

    BrakeDust New Member

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    16.666666666666666.... MPG

    Impressive. Most impressive.
     
  19. Jun 17, 2021 at 9:14 AM
    #469
    glowblue

    glowblue From time to time

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    I ran mine about 30 miles after DTE went to zero and put 34.6 gallons in with 520 miles just yesterday - 14.9 mpg for the tank.
     
  20. Jun 17, 2021 at 10:00 AM
    #470
    andnyleswillriot

    andnyleswillriot slopestyle-ski.com

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    So has anyone figured out at what point do you expose the fuel pump within the 8 gallon reserve and damage it? 34 gallons of use? Etc?
     
  21. Jun 17, 2021 at 11:02 AM
    #471
    t-rey1

    t-rey1 New Member

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    Yeah. 1/2 of it was an out of town trip highway mileage
     
  22. Jun 20, 2021 at 7:01 PM
    #472
    Tundratoofun

    Tundratoofun redline redneck

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    For the record I pumped 36.6 gals today. You just hafta have the balls to keep driving it. Btw that complaint kills me. Obviously if it holds 38 and you use 30 your only gonna get 30 into the shit.
     
  23. Jun 21, 2021 at 11:28 PM
    #473
    DirtyHulk

    DirtyHulk New Member

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    My fill up from last night
    6B934EAF-A5B8-4155-BBB5-FD8BC349A077.jpg 1B239EB4-5539-424B-B511-5055FBD117FF.jpg
     
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  24. Jun 22, 2021 at 4:53 AM
    #474
    BrakeDust

    BrakeDust New Member

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    ^^^ I'm guessing you're in Kali due to the 'Burrito' sign and the +$2/gal sunshine tax on the gas ;-)
     
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  25. Jun 22, 2021 at 7:02 AM
    #475
    Netmonkey

    Netmonkey Don't be a Dumbass

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  26. Jun 22, 2021 at 7:11 PM
    #476
    andnyleswillriot

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  27. Jul 28, 2021 at 9:53 AM
    #477
    Tundratoofun

    Tundratoofun redline redneck

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    after having this discussion again with a buddy of mine, I decided F it and ran it dry. I will fuel it in the morning and let yall know how much gas these damn tanks really hold. Im willing to bet I get at least 35 gallons in the shit
     
  28. Jul 30, 2021 at 11:19 AM
    #478
    Chip_Tundra

    Chip_Tundra New Member

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    My Tundra is almost entirely freeway driven and it is definitely capable of getting over 500 miles per fillup. I go to the gas station at the half tank mark with 280 miles on the odo, and the ecu says I have about 240ish miles left.

    When I drove from Las Vegas to the Bay Area and back, I filled up only once each way.
     
  29. Jul 30, 2021 at 11:29 AM
    #479
    Nowhereman

    Nowhereman New Member

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    One hour ago, Filled 1/2 tank up at Chevron dealer.
    Have the Chevron card discount too.
    $94.68 which equates to $5.09 per gallon with discount.
     
  30. Aug 4, 2021 at 4:51 PM
    #480
    2WD

    2WD New Member

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    The DTE calc for this truck is total BS. It's not dynamic. Someone else mentioned how other vehicles will add miles if you start doing highway driving. This one will not. The DTE is probably calculated at fill up, based on that last 100 miles or so of driving behavior.

    Instead of focusing on the DTE calc, we should be focusing on the fuel low warning light. According to the manual, that light comes on when you have about 4 gallons of fuel left, regardless of highway or city driving.

    Mine came on today and when I filled up ASAP I could only add about 31-32 gallons. So I had about 6-7 gallons remaining, rather than the ~4 the manual claimed. The DTE said I had 9 miles to empty. If DTE were accurate, it should have said I had at least 50 miles remaining at 10mpg being super conservative.
     
    Last edited: Aug 4, 2021

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