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38 gal tank ( do you drive past 'empty' )

Discussion in 'General Tundra Discussion' started by Mostel, Feb 14, 2020.

  1. Feb 14, 2020 at 9:16 AM
    #1
    Mostel

    Mostel [OP] New Member

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    Hi guys,
    New member here, thanks for providing this great resource! I am on the verge of getting a 2020 Plat Tundra. I searched extensively for real answers on this question. Hope you can help me out. So the 38 gal tank reads empty after only 28-30 gallons have been used. I'm told this is because 8-10 gallons reserve is needed to keep fuel pump primed. Here is my question. Is it safe to drive say, HALF WAY into the reserve, on a regular basis. Not draining the tank but driving 5 gallons into the reserve? Does anyone do this regularly? I need as much range as possible, but do not want to damage the fuel pump. Thanks very much!
     
    Last edited: Feb 14, 2020
  2. Feb 14, 2020 at 9:37 AM
    #2
    Nm6300'asl

    Nm6300'asl New Member

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    You will not have any issues. It is the fuel going thru the pump that keeps it cool, not being submerged under the "reserve" fuel.

    Since my '06 DC I have over 600k miles in 3 tundras, I run to below zero miles and beyond every tank and no issues
     
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  3. Feb 15, 2020 at 9:56 AM
    #3
    Mostel

    Mostel [OP] New Member

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    Thanks for reply. Is the 06 engine (5.7) different than the next gen? I'd really appreciate if some other 38 gal owners would chime in! Thanks very much
     
  4. Feb 15, 2020 at 10:00 AM
    #4
    NWPirate

    NWPirate New Pirate

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    The 5.7 was new in 07, no problems running past 0 miles left.
     
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  5. Feb 15, 2020 at 10:02 AM
    #5
    Mostel

    Mostel [OP] New Member

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    Thank you very much. Funny when you search this subject, it's hard to find a clear answer. Even the service guys at my dealer had no clue. A buddy owns a '17 and never drives into reserve - he is afraid to mess up the pump. So there's a bunch of funny info out there on this. Thanks again.
     
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  6. Feb 15, 2020 at 10:57 AM
    #6
    NWPirate

    NWPirate New Pirate

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    Yeah, reminds me of the saying opinions are like assholes, everyone's got one. :D
    I generally fill up between 1/4 & E and put around 31 gallons in.
    Enjoy the truck!
     
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  7. Feb 15, 2020 at 11:06 AM
    #7
    Tierhog

    Tierhog SIG-AHOLIC

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    I generally fill at or around 1/4 tank. If I needed extended range, I'd get a transfer tank. Most of the time gassing up is a matter of convenience, not really fuel remaining. Guess it's the benefits of a large tank. I also refuel exclusively at Costco for points.
    Example. Family wants to drive from home to San Diego. We CAN range out that far, but why not get Costco fuel in Bakersfield and not sweat gas for awhile. Generally you'll want to get out and stretch after 6-8 hours of driving anyway.
    Just my. 02
     
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  8. Feb 16, 2020 at 9:13 AM
    #8
    Mostel

    Mostel [OP] New Member

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    I appreciate everyone's reply. But I'm surprised 10-15 owners didn't chime in. This should be a no brainer question, but it continues to be one where there is no definitive answer. Weird!!
     
  9. Feb 16, 2020 at 11:11 AM
    #9
    Bergmen

    Bergmen New Member

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    This has been discussed in dozens of threads, that is probably why few people have responded.

    I have run mine to "0" a couple of times and each time I had about 9 gallons left. Some have run completely to the point they put 38 gallons in at fill-up. Best thing to do is keep track of your mpg (don't trust the dashboard call out, it is an estimate) and get a handle on the actual quantity in your tank over time.

    Dan
     
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  10. Feb 16, 2020 at 11:37 AM
    #10
    7dgoat

    7dgoat Member

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    My guess is that Toyota's read zero with 8 to 10 gallons left to keep the fuel pump submerged. I know the 2015 with 24 gallon tank I had read zero with 4 gallons left. I always heard that the fuel keeps the pump cool. Toyota is big on reliability. So I think they make zero the point where the pump begins to hit air. That way they never get hot and die prematurely. That's my guess.
     
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  11. Feb 16, 2020 at 12:57 PM
    #11
    Doylfish

    Doylfish New Member

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    even when I’ve fueled at a point I’ve felt I’ve pushed it far enough I’ve RARELY seen 33 gals on a fill. Usually when I fill I’m putting in 30-31, and this is regular for 4 years of ownership now
     
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  12. Feb 16, 2020 at 2:39 PM
    #12
    easleycrawler

    easleycrawler TOYOTA ADDICT- SSEM #78

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    Cost too much to fill up when it's on empty. I fill up at half a tank or just below half.
     
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  13. Feb 16, 2020 at 2:46 PM
    #13
    Mostel

    Mostel [OP] New Member

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    Thanks guys. If you look at thread, one person says the fuel pump is primed by gas going THROUGH it. Another says, when it reads empty is when it begins to "hit air", suggesting that if you drive further, the pump gets more exposed to risk. Yes there are tons of threads on this but no agreed upon conclusion. This 38 gal tank is a major buying point, but seems like almost no one drives 35-36 gals. In any other vehicle, the gauge would tell you your remaining miles. It's not a deal breaker but why is there no definitive answer in writing from Toyota? Or is there?
     
  14. Feb 16, 2020 at 3:03 PM
    #14
    Pinski

    Pinski New Member

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    I always wait till well after the light comes on until I fill up. That’s the benefit of having Such a big tank, you don’t have to fill up as much...I usually put 32-34 gallons in minimum when I fill up.
     
  15. Feb 16, 2020 at 3:08 PM
    #15
    50 Buck

    50 Buck ASCM#1 Douchebag formerly known as AzureNightmare

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    If you're going to push the range then make sure you park it level. The 38 gallon tank is very long, so with low fuel you could park on an angle and run the remaining fuel away from the pump. There was a member on here who did it in a steep driveway.
     
  16. Feb 16, 2020 at 3:19 PM
    #16
    Ely010606

    Ely010606 New Member

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    X2^^, same here
     
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  17. Feb 16, 2020 at 9:08 PM
    #17
    A-A-Ron

    A-A-Ron Done messed up

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    Same for me, I don’t even think about getting gas until the light comes on. Drive to work and maybe stop somewhere on my way home. Even at that point I’ve never put in more than 33 gallons.
     
  18. Feb 16, 2020 at 9:55 PM
    #18
    Green Thunder

    Green Thunder Never leave the ground with the motor leaking.

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    I ran mine to almost "zero miles remaining" and pumped in 34.5 gallons. There are a lot of different results here on the forum, so I recommend doing your own testing and see how your truck performs.
     
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  19. Feb 17, 2020 at 3:14 AM
    #19
    KarmaKannon

    KarmaKannon Master of None

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    I think Toyota must just normally give you a pretty good reserve. It is human nature to push any opportunity or advantage to the limit. My 06 is sitting at 1/8 or less and will take around 16-18 gallons and I think it's a 26 gallon tank. I had the light come on once and I've never as much as 20 gallons on it.

    My advice is keep a 7 gallon Jerry can in your truck and fill it up at 1/4 tank. That way you are covered if there's an emergency. Your pump is happy, you are happy, your dependents are happy, the guy on the side of the road that thought "empty" was something to be pushed is happy. Happy happy happy happy.
     
    Last edited: Feb 17, 2020
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  20. Feb 17, 2020 at 3:46 AM
    #20
    Stumpjumper

    Stumpjumper New Member

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    How much you spend on gas is dependent on how much you drive not when you fill up. I have driven mine past zero several times. I would not listen to the internet hype about keeping the pump cool. Stopping to get gas takes time and my time is worth something.
     
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