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Scraped bottom on a speed bump - now MPG is suffering.

Discussion in '2nd Gen. Tacomas' started by wh013mi1k, Oct 11, 2012.

  1. Oct 11, 2012 at 6:46 AM
    #21
    kingston73

    kingston73 Well-Known Member

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    Here, there, and everywhere
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    Different states, different brands, different gas, different mpg. Not all gasoline is made exactly the same so it could just be VA gas vs RI gas.
     
  2. Oct 11, 2012 at 6:51 AM
    #22
    wh013mi1k

    wh013mi1k [OP] Well-Known Member

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    This would be the only time in history Rhode Island didn't suck the worst out of all the states. I should inform the media.
     
  3. Oct 11, 2012 at 7:09 AM
    #23
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    Well hold on now... lets not get ahead of ourselves :D
     
  4. Oct 11, 2012 at 7:09 AM
    #24
    ruggedT

    ruggedT The Sticker Guy Vendor

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    Icon, 34's, skids, ect
    So your mudflaps hit...?
     
  5. Oct 11, 2012 at 7:11 AM
    #25
    OZ-T

    OZ-T All of those moments....will be lost.....in time

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    Dis
     
  6. Oct 11, 2012 at 7:11 AM
    #26
    hetkind

    hetkind Well-Known Member

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    Howard
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    bilstein set at 1.75, Racho 5000 rear with 4 leaf kit, floor mats, high lift jack, pull hook in hitch, bed rail corner braces, severe duty brake pads and devil horns on the grill....
    Not winter gas, but different local fuels. Different areas have different fuel blends. Give it a tank or two and see what happens. We got some bad fuel on the motorcycles recently and lost 5 mpg for a couple of tanks.

    Howard
     
  7. Oct 11, 2012 at 7:29 AM
    #27
    2004TacomaSR5

    2004TacomaSR5 Well-Known Member

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    This, those things get hung up on everything. And I am with whipper on the winter mix part, it is about that time of year. I am not entirely certain what they do to fuel in winter either, but I think they add special additives to keep it from freezing in your fuel lines or something. These in turn make mpg go down somehow.
     
  8. Oct 11, 2012 at 7:37 AM
    #28
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Marcelasaurus
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    Check Build Thread!!
    The mud flaps are hard plastic, this is very possible.
    IIRC its an anti-freeze additive. More glycol based then ethanol
    Your my god damned hero.
     
  9. Oct 11, 2012 at 8:51 AM
    #29
    shemp

    shemp Well-Known Member

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    Ethanol stores 90% as much energy as gasoline by volume, so at a 10% mix, E10 stores 99% as much energy as straight gasoline. By example, that means dropping from, say 20 mpg to 19.8.

    Winter gas is more about ease of starting than about keeping water contamination from freezing into ice. Take your summer gas down to -30 degrees, it has a lower vapor pressure, i.e., lower volatility, and much more difficult to ignite. Manipulating the fuel to increase the vapor pressure is done to make it easier to ignite the fuel while also maintaining an acceptable "at temperature" tendency towards ignition. That is an important balance, because otherwise, when the engine warms up, it would start into preignition.

    So what they effectively do is alter the fuel to use a higher portion of smaller and more volatile hydrocarbons, which store significantly less energy per unit of volume. This has far far more effect on the fuel consumption than the ethanol content.
     
  10. Oct 11, 2012 at 8:53 AM
    #30
    DrewH

    DrewH Well-Known Member

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  11. Oct 11, 2012 at 10:18 AM
    #31
    wh013mi1k

    wh013mi1k [OP] Well-Known Member

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    To close the loop on this (because I like to finish everything) - the winner of the "Tacoma Scrape Sweepstakes" is....


    Pugga. He was right [first] - It was the goddamn mudflaps.

    Thank you everyone for the suggestions and insights. This is a great community and I'm happy to have stumbled upon and become a part of it.
     
  12. Oct 11, 2012 at 10:22 AM
    #32
    OZ-T

    OZ-T All of those moments....will be lost.....in time

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    Haha

    You're banned
     
  13. Oct 11, 2012 at 10:26 AM
    #33
    Gotcha88

    Gotcha88 Well-Known Member

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    This is what I'm thinking..

    Also OP, what is the difference in your normal driving conditions vs the road trip you went on? These can certainly change things up.
     
  14. Oct 11, 2012 at 10:34 AM
    #34
    wh013mi1k

    wh013mi1k [OP] Well-Known Member

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    I subscribe to the scientific method - so take this with a grain of salt. But the road down to VA I got 18 mpg (all highway) using RI gas; on the way home to RI (all highway again) I got 16 mpg on gas. I use cruise control ~74 mph all the way and maintain as I usually drive at times with no traffic. What the group consensus of "winter" or regional gas would make sense.

    However, before I definitely say that this is the case I would want to repeat the same conditions on my next trip; however, if RI switches to their "winter blend" before Thanksgiving (which is probably likely) I wouldn't be able to test.

    THAT, and I'm way too deep on something so trivial at this point :p
     
  15. Oct 11, 2012 at 10:42 AM
    #35
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    :woot:

    What did I win?
     
  16. Oct 11, 2012 at 10:43 AM
    #36
    wh013mi1k

    wh013mi1k [OP] Well-Known Member

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    Respect, Pugga... respect.
     
  17. Oct 11, 2012 at 11:03 AM
    #37
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    word :cool:
     
  18. Oct 11, 2012 at 11:14 AM
    #38
    OffroadToy

    OffroadToy The dog did it...I swear!

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    Welcome aboard wh013mi1k! Yep those @&%$# mudflaps are way too low. Alot of guys here either take them off or trim and inch or two for more clearance. As far as your mpg i was wondering...between your test trips is there much elevation difference?
     
  19. Oct 11, 2012 at 11:29 AM
    #39
    TenBeers

    TenBeers Well-Known Member

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    Geez, it's so simple. Going to VA you are headed down, to RI you are headed up. Look at a freakin map.
     
  20. Oct 11, 2012 at 11:37 AM
    #40
    wh013mi1k

    wh013mi1k [OP] Well-Known Member

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    Negligible. The area of VA I head into is just outside of DC - too far east to hit the mountains. Plus, I would argue that it would be equal both trips as I take the same route down and back.

    BUT, for arguments sake the elevation of RI is 200ft+ and the elevation of Vienna, VA is 358ft+. If the Tacoma is impacted by that small of a delta then I chose the wrong truck to purchase....
     
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