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Is it normal for MPG to greatly decrease after 70+ mph

Discussion in '3rd Gen. Tacomas (2016+)' started by taco_newb, Jan 11, 2018.

  1. Nov 24, 2021 at 5:54 PM
    #141
    docsg

    docsg Well-Known Member

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    I live in AL and travel to central KY frequently. If you run the speed limit on I-65 (normally 65-70 depending on location) a semi or irritated driver will run right up your rear in. Normal cruising speed for me is around 80 and not in the inside lane as I'm being passed like I'm standing still!
     
  2. Nov 24, 2021 at 7:53 PM
    #142
    cryptolyme

    cryptolyme Well-Known Member

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    everyone drives like it's a race on the highway and it's annoying as fuck. going 10 over in the slow lane with cruise control and people are still getting pissed off? just fuck off you pricks
     
    wiljayhi and shotgunbilly420 like this.
  3. Nov 24, 2021 at 8:02 PM
    #143
    aozer

    aozer Well-Known Member

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    he is speaking for everyone who isnt completely full of shit. i.e. you.
     
  4. Nov 24, 2021 at 9:00 PM
    #144
    TRD-Troll

    TRD-Troll Ban the Mods

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    My dash MPG thing claims 20~mpg on 35~ mile drives up in the eastern slope of the Sierra range. Speed at the limit between 60-70mph. Calculation matches up fairly well with my odometer and refueling intervals.
     
    Junkhead likes this.
  5. Nov 24, 2021 at 9:25 PM
    #145
    SLeeper512

    SLeeper512 Well-Known Member

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    im surprised it hasn’t been suggested too… though it would never pass. It would also reduce miles driven as it was a really hated speed limit.

    the above being said most cars get a LOT better mileage than they did back then. Even the pickups get better. Many used to average less than 10mpg… of course they were bigger and had some really strong engines
     
    RedWings44 likes this.
  6. Nov 25, 2021 at 6:26 AM
    #146
    SDTaco4x4

    SDTaco4x4 Well-Known Member

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    How am I full of shit? Plenty of people get good mileage out of their Tacomas. It's not hard to do, depending how one drives.
     
  7. Nov 25, 2021 at 6:31 AM
    #147
    RedWings44

    RedWings44 Well-Known Member

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    MI actually raised the speed limits a few years ago. Coincidentally at the same time they raised the gas tax.

    Genuine question: other than California and sales, what governments have banned gas vehicles?
     
  8. Nov 25, 2021 at 6:32 AM
    #148
    RedWings44

    RedWings44 Well-Known Member

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    Yes. I have a coworker who constantly reminds us that trucks in the 70's and 80's could get 24 MPG. But he was also talking about a tiny 4 banger pickup without 4x4.
     
    SLeeper512, Junkhead and shakerhood like this.
  9. Nov 25, 2021 at 6:52 AM
    #149
    Snoman002

    Snoman002 Well-Known Member

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    off the top of my head I think France at least, I feel like there were a couple more. My memory may be very bad here but I think ice vehicles were being banned in sales and something about them being banned completely in Paris itself
     
  10. Nov 25, 2021 at 1:41 PM
    #150
    Badname

    Badname Well-Known Member

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    I'm constantly smashing the pedal and drive 80 as traffic allows. I average 20.5 per gallon. I'm running KDMAX Pro. Sliders and Backflip cover, stock wildpeak tires.
     
  11. Nov 25, 2021 at 2:22 PM
    #151
    DAS Taco

    DAS Taco Well-Known Member

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    I remember when Montana lifted the daytime speed limit in the mid nineties...back then I had a VW Jetta GTX...16v...nice car but unreliable. Drove down there (I'm just up across the border in Alberta) to open it up...reached 201 Kilometers per hour!, ended up trading it for a BMW...
     
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  12. Nov 25, 2021 at 2:34 PM
    #152
    Junkhead

    Junkhead TRDude

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    You traded 1 unreliable car for an even more unreliable one, haha!
     
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  13. Nov 26, 2021 at 4:26 PM
    #153
    herrindude

    herrindude 2021 dclb sr5 v6 with leer camper shell

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    If i drive easy and set the cruise i can pull 23 to 26 mph but my truck is not 4x4 and i have a camper. And that is on open roads. 507DDE99-6D2D-4EB1-A278-AB1D1A49D08B.jpg
     
    b_r_o likes this.
  14. Nov 26, 2021 at 4:33 PM
    #154
    axeeclipse

    axeeclipse Member

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    I generally do 80-85 here and according to the dash I get 20mpg. Stock SR5 4 dr
     
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  15. Nov 27, 2021 at 3:48 PM
    #155
    willie2

    willie2 Well-Known Member

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    The single biggest drop in fuel economy occurs when speed is increased from 65 to 70 mph (9%). MPG is relatively constant until 55 mph is reached and wind resistance begins to take effect. This is a general calculation based on average cd and frontal area and is not based on a particular vehicle. Yours may be different than this but the premise will be the same.
    speed increase from 55mph to 60mph -3%
    speed increase from 55mph to 65mph -8%
    speed increase from 55mph to 70mph -17%
    speed increase from 55mph to 75mph -23%
    speed increase from 55mph to 80mph -28%
     
  16. Nov 27, 2021 at 3:53 PM
    #156
    MIDTNTACO

    MIDTNTACO Well-Known Member

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    Preach on brother! :headbang:
     
  17. Nov 27, 2021 at 4:34 PM
    #157
    JustJon

    JustJon Well-Known Member

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    What your saying is… we need to turbo our tacos…
     
    shotgunbilly420 likes this.

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