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2017 TRD CrewMax Gas Tank Capacity

Discussion in '3rd Gen Tundras (2014+)' started by k9i449, Jun 16, 2018.

  1. Jun 16, 2018 at 6:21 AM
    #1
    k9i449

    k9i449 [OP] New Member

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    My 2017 TRD CrewMax with off road package has the large 38gal gas tank. However, the read out on the dash, at a 1/4 tank will say less than 60miles left, that was yesterday. I fill up and put
    24.5gal then went to 415 miles, I've noticed this before. So means I had around 10 gal left.

    Has anyone else had this, or do they just not want you to run out of gas?
     
    Grey Wolf likes this.
  2. Jun 16, 2018 at 8:12 AM
    #2
    COMiamiFan

    COMiamiFan Now you know something

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    Don’t do the math on this, it will drive you nuts. The math never makes sense. I do know that they don’t want you to runfuel too low as the fuel pump needs it to keep cool, so it’s adjusted accordingly.
     
    Stroke250 likes this.
  3. Jun 16, 2018 at 8:17 AM
    #3
    k9i449

    k9i449 [OP] New Member

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    THANKS, to me just seemed weird. Then I saw on here guys were putting on aftermarket 46gal tanks. WHY? I ran Dodge diesel for 15 years with a total of 90gal on, I got it back when fuel went to 5.00a gal. It was nice using GASBUDDY, fill up cheapest you could find drive for 1000 miles. But now days I wouldn't
     
  4. Jun 16, 2018 at 8:19 AM
    #4
    nk1794

    nk1794 Always torque to spec

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    Yeah I think they are being very conservative with the calculation.
     
  5. Jun 16, 2018 at 8:34 AM
    #5
    ARamirez73

    ARamirez73 RIDIN' THEM RAILS TO ANYWHERE

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    Welcome from Texas, you have the 38 gal tank? I have the 24, I want the 38
     
  6. Jun 18, 2018 at 4:50 AM
    #6
    JeremyGSU

    JeremyGSU New Member

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    There are two gas tanks available on the Tundra. A 26 gallon and 38 gallon. Both have large reserves.

    If you run both down to "0" miles till empty on average here is how many gallons you will get back in the tank.

    26 gallons = 20-22 back in
    38 gallons = 30-32 back in
     
  7. Jun 18, 2018 at 12:54 PM
    #7
    cityneck

    cityneck New Member

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    Can confirm @JeremyGSU is correct with the 38 gallon tank.
     
    big_jarv likes this.
  8. Aug 8, 2018 at 7:40 PM
    #8
    aries82

    aries82 New Member

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    Hi everyone, I checked this thread a while back because I also could not make sense of the fuel tank capacity. I KNOW it is a 38 gallon tank, however with "40 miles remaining", I could never get much more than 30 gallons in. After reading this and assuming the same, I figured it was the computer being cautious (or wrong). HOWEVER, I have since discovered that when you are filling your tank, the pump will STOP at least 2.5 gallons short of a fill-up. Try it. I get the impression that the connection to the tank (from nozzle) is quite funnel shaped. Gasoline fills to the nozzle, but then slowly funnels down, slower and slower as it approaches capacity. I've been able to get 32.5 gallons in this way. It is extremely time-consuming, but I am still having enough fun having "discovered" this that I don't mind playing with the pump to see just how much more I can squeeze in. A bit of a design flaw, really. Don't assume it is just the computer being cautious - there is at least a 2.5 gallon void.
     
  9. Aug 8, 2018 at 8:00 PM
    #9
    CCLJ03

    CCLJ03 New-ish Member

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    I don’t think topping off like that is good for your truck.

    I talked to a mechanic a while back who said it messes up the vapor filter or something like that.
     
  10. Aug 8, 2018 at 8:46 PM
    #10
    JTX Tundra

    JTX Tundra New Member

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    I have a 2018 Limited with the 38 gallon tank. When my range goes to zero and it says refuel, the fuel warning light comes on. If I fill up around when this happens I can put in about 32 to 33 gallons stopping when the pump stops, not trying to fill as full as possible.

    I can't imagine Toyota turning on a gas warning light when you are at zero miles left. So if you are filling up when the range says 40 miles and you put 30 gallons in, it sounds about right.
     
  11. Aug 8, 2018 at 8:49 PM
    #11
    aries82

    aries82 New Member

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    Just don't want anyone assuming they have more gallons than they do; it's really a 35-36 gal capacity if not filling to the top; seems the warning is cautious, but not necessarily overly.
     
    ChrisTRDPro likes this.
  12. Aug 8, 2018 at 8:53 PM
    #12
    ChrisTRDPro

    ChrisTRDPro New Member

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    I have read they put the warning light on with 6-8 gal left because the gas "cools" the fuel pump, so you have to keep the pump submerged in gas. No idea if that's true or not, I'm going to guess that's only partially true at best. It's probably more so that people don't run out of fuel.
    I have gone over 50 miles after I had 0 miles left a few times and only put 33-34 gal in the 38 gal tank.
     
  13. Aug 10, 2018 at 12:11 PM
    #13
    dmproske

    dmproske New Member

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    Yeah I ran it down to 0 and 30 miles further. Got about 32 gallons back in.
     
  14. Aug 11, 2018 at 7:03 AM
    #14
    eddie98

    eddie98 New Member

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    There has only one time were I ran low. It had 1 mile left to go. The most I was able to put in was 35 gals.
    Does a low fuel light warning come on? or just keeps saying 0 miles left?
     
  15. Aug 11, 2018 at 9:19 PM
    #15
    Khunter

    Khunter New Member

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    We all need to be calling Toyota Customer Support about this problem. I have 2017 Tundra CrewMax with the 38 gal tank and I can never get more than 31 gal in the tank at fill up and that’s driving it 30-40 miles past 0 miles remaining. This guage and fuel remaining computer is a joke. I talked to my local dealer and they’ve heard this complaint many times from just bout every Tundra owner. Toyota needs to release a Service Bulletin to upgrade the onboard software. Heck this is such a nuisance I’d pay for the darn thing! And the rumors about you need 8 gal of reserve fuel for fuel pump cooling are totally bogus according to the service personnel at the local dealer.
     
  16. Aug 11, 2018 at 9:21 PM
    #16
    Khunter

    Khunter New Member

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  17. Aug 11, 2018 at 9:24 PM
    #17
    Devcom

    Devcom New Member

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    This does not really bother me as much to be honest I get almost 500 miles to the tank mixed as it is. The other reason in my first truck I ran the tank to empty like an idiot and sucked up crap from the bottom of the tank and it screwed things up. EDIT: First truck was on 06 Chevy and in my defense the fuel gauge stopped working but even still I probably should have noticed something.
     
  18. Aug 12, 2018 at 6:57 PM
    #18
    greengs

    greengs New Member

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    The fuel pump thing is a myth that persists on a lot of boards. The pump is cooled by fuel going through it and not fuel around it. The large reserve is there simply to be conservative. All vehicles have it. Tundra has one of the largest if not the largest reserve on the market though.
     
    ChrisTRDPro likes this.
  19. Aug 13, 2018 at 7:08 PM
    #19
    PA452

    PA452 New Member

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    Did my first fill up the other day. Computer said I had about 70 miles left, but I was about to leave on an all-day trip so I figured I'd fill it up. It took 27.5 gallons.
     

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