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38 Gal tank experiences....

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

  1. Mar 20, 2018 at 7:48 AM
    #31
    Boerseun

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    Yes, I agree. I think the Bronco's tank was not as long as the Tundra's. It was more of a big square box. The Tundra's problem is the shape - it is a long snake that they had to try and fill in all the available voids, causing it to be so long which is really not an effective/optimum shape for the tank.
     
  2. Mar 20, 2018 at 8:16 AM
    #32
    nk1794

    nk1794 Always torque to spec

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    I love the 38G tank. I'm currently getting about 13.7 MPG with combination of freeway speed driving and some stop and go.
    Here is a video while filling up at Costco about a month ago.
    https://youtu.be/A9VK28g3xSw
     
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  3. Mar 20, 2018 at 8:54 AM
    #33
    KeithM

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    It's the basic physics OF THIS DESIGN that's the problem. The other guy's 93 Bronco has the same size tank, but not the same problems. No gyroscope there. There are better fuel pumps available with a larger surface intake area that use a higher percentage of the tank.

    It's not that I can't live with it. It's just that we are all trying to reverse engineer what the darn behavior is because we aren't told. The user's manual says nothing about usable fuel. Something simple in the manual like "There is little to no reserve fuel available once the LOW FUEL WARNING indicator is on. Environment factors, especially downward slopes, can cause the remaining fuel in the tank to be unusable. If you have the 26 gallon tank, be aware that only 20 gallons are usable in all situations. If you have the larger 38 gallon tank, be aware that only 31 gallons are usable in all situations."
     
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  4. Mar 20, 2018 at 9:36 AM
    #34
    15whtrd

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    I look at it this way, you have 12 more gallons of fuel than my 26 gallon tank. You essentially have 10 to 12 more usable gallons of fuel than I do. It’s a win in the end. Maybe not compared to what you’re able to squeeze out of another manufactures fuel tank, but you still have an advantage. If you are fairly level you can get most of the fuel out of there. Most of the time you are not keeping the truck at a constant incline unless parked. So you shouldn’t run out of fuel if you keep moving.
     
  5. Mar 20, 2018 at 10:03 AM
    #35
    cu52

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    I had a 2009 tundra (26.4 gal) and a 2008 sequoia (26.2 gal) and referencing my gas logs Most i ever filled up in the Tundra was about 24.18 gallons I show 1 full up of 25.28 but I am guessing that included 2 gallons for the lawnmower.

    For the sequoia most was 24.59 average around high 21's to mid 22's.

    I now have a 46 gallon transferflow. gas light on I filled up 37.03. Way too chicken to go much more than that on it.
     
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  6. Mar 20, 2018 at 3:31 PM
    #36
    SNO BUS

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    Yuuupp. It's a bit of a disappointment that it's advertised as 38 gal, but in the long run, everyone else also has to deal with it and it's really not that big of a deal. I don't know how it is on other trucks, but a fuel tank that can't take as much as it advertises should never be enough of a reason to buy a truck other than a Tundra. Be a glass half full kind of person! :)
     
  7. Mar 20, 2018 at 4:08 PM
    #37
    geno0506

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    I must have a whole in tank because it empties fast! May be defective or the fuel gauge has a magnetic pull towards empty!
     
  8. Mar 20, 2018 at 5:15 PM
    #38
    Rngr188

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    I've had five 96-98 Chevrolets which were known for burning up fuel pumps, I never let them get below a 1/4 tank so the pump would stay submerged but once I basically ran my 2dr Tahoe (still have) dry and guess what: I burnt up the pump. I try to fill my Tundra (38 gallon) up around a half tank so I have no idea how long it'll go I think 1/4 tank is the lowest she's been.
     
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  9. Mar 20, 2018 at 7:08 PM
    #39
    folly87

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    I can vouch for all 3 of my tundras and 2 of my wife's rav4s being notoriously cautious with "empty". I don't know if it is just to make it stupid proof or one of the other reasons mentioned, but it does get frustrating. I will agree that 32 is better than 19 or 20 that you could get in the 26 gallon tank. Taking road trips in my 14 Tundra was a joke, stopping more for gas than for peeing...
     
  10. Mar 20, 2018 at 7:23 PM
    #40
    Coolhardy

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    I will buy your fuel tank If any of you 38 gallon members want to upgrade to transfer flow.
     
  11. Mar 20, 2018 at 7:46 PM
    #41
    CampingCoynes

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    Glad I read this thread! Thought maybe I was going crazy on our first trip with the Tundra. Whenever I happened to re-fueled after low fuel light came on, I was only putting 28-30 gal back in it. Could of sworn I bought the damn 38 gal truck LOL. Thanks for the info everyone!
     
  12. Mar 21, 2018 at 6:07 AM
    #42
    slab

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    But shouldn't you be able to manufacture the tank with grooves/channels in the bottom of the tank to reduce the amount of fluid in the lowest point?
     
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  13. Mar 21, 2018 at 6:12 AM
    #43
    15whtrd

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  14. Mar 21, 2018 at 12:35 PM
    #44
    nodak67

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    i guess you folks will still complain after 100-200k miles that this advertised 38gal tank sucks.

    typically Toyota low fuel light comes on at either 10% or 15% of tank capacity. this is to ensure you have enough gas to find a station and to ensure the fuel pump stays lubricated.

    would you rather have a system that runs down to 1-2 gals left in the tank and you go "oh crap I need gas" and you are 50 miles to the next gas station. or how about burning up fuel pumps cause its never properly cooled/lubricated or dredging up crap from the bottom of the tank and feeding that down the line to the engine.

    you know if you have a vehicle for 100+ k miles that tank will accumulate crud in the tank, and as mentioned above, having grooves/channels in a tank and putting a pickup just means all the crud is concentrated into those spots.

    i rather have the engineering smart pants ensure that you rule out early component(s) failure by designing a system to rule out 90% of the day to day problems incur on a system.

    this is the concept that the land cruiser is based on. they build that vehicle to a 25 yr life span as the baseline, so a lot of stuff is about 25% more robust than your typical offerings from Toyota (the frame is 25% thicker for this concept)

    :)
     
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  15. Mar 21, 2018 at 12:46 PM
    #45
    15whtrd

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    I wasn’t complaining. I was merely offering a solution. So basically no matter what angle you park the truck at it will never starve for fuel because this is an absorption mat. My solution is a filter also, so the crud in the tank would be a non-issue. Keeping the fuel pump submersed, that is a whole other issue. I only have a 26 gallon tank so I have no dog in this fight. I usually start searching for a gas station at the least a quarter tank. I don’t even like it below 3/8 tank. I’ve also never had starvation issues.
     
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  16. Mar 21, 2018 at 12:46 PM
    #46
    BuckWallace

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    I think everyone understands that the low fuel lights in vehicles come on when there is still fuel left in the tank. Even brand new drivers figure out there is a "buffer" to get you to a gas station. That's not the problem. The issue is that Toyota says there is a 38 gallon tank, but if you use most or all of those 38 gallons, you could be damaging a critical component? Sounds to me like while it does physically hold 38 gallons, you can't actually use them without damaging your truck. It's like saying the towing capacity is 9,000 lbs, but if you tow over 7,500 lbs you'll damage the truck.
     
  17. Mar 21, 2018 at 12:47 PM
    #47
    15whtrd

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    I don’t think you should practice using more than 30 gallons before fueling up. But I do think they should be available for emergencies.
     
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  18. Mar 21, 2018 at 12:50 PM
    #48
    BuckWallace

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    I agree, and I don't. This whole thing isn't really a big deal to me, but I'm just pointing out that advertising a 38 gallon tank that damages your fuel pump if you use most of those 38 gallons doesn't really seem right to me.
     
  19. Mar 21, 2018 at 12:55 PM
    #49
    15whtrd

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    I think you have a point. But I’d be willing to put money on most large fuel tanks with submersed pumps would not do well with regular tank draining’s. I don’t know what manufactures do it that way but I’m sure a lot of them. Our company head mechanic insists that we never let our trucks go below quarter tank because he says that the pumps burn out. We have to listen to him LOL
     
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  20. Mar 21, 2018 at 1:13 PM
    #50
    nodak67

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    but then again pretty much all manufacturer's do this now so its a moot point. the old days were you could run a tank down to fumes is over when the moved the pump from external to internal to save space, but then again a lot of externals if I remember were prone to failures due to running a tank to dry.

    also from a safety stand point

    and the towing issue is the same, just because you can pull 9000lbs doesn't mean you can do it safely, same concept applied to a gas tank. you can use the 38gals but should you?

    edit : also filling up your tank to the gas cap, you can but should you? you run the risk of fouling the charcoal canister due to the fuel vapor system mandated by EPA to capture fuel vapors.

    :)
     
    Last edited: Mar 21, 2018
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  21. Mar 21, 2018 at 1:19 PM
    #51
    nodak67

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    and to add to that, during the winters we usually don't go below 1/2 tank for various reason.

    1. safety (being stranded in the middle of no where during the cold months (below freezing or below zero for weeks at a time)
    2. ensure any water in the tank isn't accidently pulled into the fuel lines and freezing
    3. fuel tanks during winter can absorb some moisture from warming/freezing cycles
    4. ethanol gas tends to absorb moisture more than non ethanol gas
     
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  22. Mar 21, 2018 at 1:51 PM
    #52
    JeremyGSU

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    I agreed with all but had to laugh at this one. With the 38 gallon tank and 1/2 tank you have over 200+ miles before you even get it to "0" and you'd still have gas. Where do live that you couldn't find gas in that kind of distance? lol
     
  23. Mar 21, 2018 at 2:00 PM
    #53
    15whtrd

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    I could only think of one answer. Butt fuck Egypt. Lmao although I know there is some quite rural areas still left, even in the United States. I know in Alaska I would always want a full tank.
     
  24. Mar 21, 2018 at 2:15 PM
    #54
    nodak67

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    its being stranded during the winter months. it happens a lot up here where the conditions and the extreme rural country side makes being stranded make things life threating.

    you have to remember, there is only about 5-7 major cities in north Dakota and the 5th largest is only 50k pop. hell the air force base is the 7th largest "city" during the work week when everyone comes to work.

    we can hit -20's easy during the winters here and people stuck on side roads outside the 2 interstates (94 & 29) and the 2 major rural highways (2 & 83) sometimes have to wait hours/days before someone will notice a ditched vehicle. hence the 1/2 tank rule in case you have to wait a few hours for help (and not everywhere has cell phone receptions sometimes). at least once per winter you hear of someone trying to walk to the nearest farm house or back along a dirt road freezing to death and being disoriented and dying.
     
  25. Mar 21, 2018 at 2:18 PM
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    BuckWallace

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    Uhhh, if the manufacturer says the truck can tow 9,000 lbs then that DOES mean I can do it safely. Do you think Toyota would set a certain towing capacity above safe levels? The answer is most definitely "no". I'm sure the truck could tow 12,000 lbs, but the manufacturer hasn't said it can tow that much, so that of course is not safe.
     
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  26. Mar 22, 2018 at 4:49 AM
    #56
    nodak67

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    so in other words you are saying you are going to safely pull 9000 lbs with just a hitch and nothing else?

    yes you can pull 9000 lbs but do "I" consider it safe? no.

    I want a WDh, sway control arms, prob air bags to level the truck (yeah the headlight leveling system is great and the electronic sway control but..)

    so what parts of those systems outside the headlights and elect. sway control come with the truck?

    edit : each person has a different outlook on how oem's present stuff. I prefer to look at those values in regards to numbers as a best case value, not a prudent/safe value.

    do I want to run a tank down to 1-2 gals? no but I can if I really try. do I want to deal with the negative side effects of doing that? nope I am told old to deal with that crap anymore. easier to put 1% of effort in to not have to deal with 20% headaches.

    same goes for tow rating. do I want to pull all the time at 9k load with just a truck with nothing else? no but I can and deal with the issues that may come up doing that.

    do I think its safe to pull 9k without those other systems in place to ensure I have a safe tow? nope. I rather get my truck and what I am towing safely to wherever with the lowest amount of issues.

    its all about risk management, each person has a different tolerance.

    :)
     
    Last edited: Mar 22, 2018
  27. Mar 22, 2018 at 6:14 AM
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    War Machine

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    Here’s my circumstantial evidence:

    My wife used to drive a Tahoe. She would run it bone dry all the time. No gas in it every time I’d get in. I kept telling her “Don’t do that. It will mess up your fuel pump.”

    She messed up her fuel pump.
     
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  28. Mar 22, 2018 at 6:17 AM
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    15whtrd

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    I’m always telling my wife to not let it run so dry. Luckily she does try to get gas as soon as the light comes on. But she’s funny, she only throws a 20 in it and never fills it up. Its a 08 Scion xB So it usually gives it about 3/4 tank, but still, fill it up woman!
     
  29. Mar 22, 2018 at 6:24 AM
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    War Machine

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    Jason
    Texas
    I saw a funny video about this once. Need to find it.
     
    15whtrd[QUOTED] likes this.
  30. Mar 22, 2018 at 6:25 AM
    #60
    BuckWallace

    BuckWallace Ball don't lie.

    Joined:
    Nov 25, 2017
    Member:
    #11160
    Messages:
    1,857
    Gender:
    Male
    Oregon
    Vehicle:
    Sierra 3500 AT4 Gasser
    A gas station attendant (yep, here in OR) once legitimately posed the question to me of whether it would be cheaper to fill the tank up all at once or just a little at a time... o_O
     
    Dstride and 15whtrd[QUOTED] like this.

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