1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

hot weather fuel econmy

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Blueridge, Jun 29, 2010.

  1. Jun 29, 2010 at 12:08 PM
    #1
    Blueridge

    Blueridge [OP] Well-Known Member

    Joined:
    Oct 17, 2008
    Member:
    #10022
    Messages:
    244
    Gender:
    Male
    My truck loves the heat. Last tank mixed driving with AC on 20.5mpg. What a difference from the cold months.
     
  2. Jun 29, 2010 at 12:20 PM
    #2
    bearing01

    bearing01 Member

    Joined:
    Jun 17, 2010
    Member:
    #39119
    Messages:
    18
    Gender:
    Male
    First Name:
    John
    San Diego
    Vehicle:
    4x4 TRD V6 MT
    1. Summer gasoline has higher energy content than winter gas. Winter gas is reformulated to have oxygenates added to help have complete combustion on cold starts for less emissions. Oxygenates are chemicals like ethanol that have lower energy density. Therefore, summer gas gives you more btu's per gallon.

    2. Hot air is less dense (thinner) than cold air. This means you have to burn less fuel for the given volume (or rpm) the engine is breathing. Means you are burning fewer miles per gallon.
     
  3. Jun 29, 2010 at 12:21 PM
    #3
    skytower

    skytower Well-Known Member

    Joined:
    Jun 7, 2010
    Member:
    #38505
    Messages:
    3,228
    Gender:
    Male
    First Name:
    Dave
    virginia
    Vehicle:
    08 Tacoma 4x4
    Hitch and wiring, aux back-up light, rear strobe lights, radio and underseat sub.
    It's not the temp that does it, it's the fuel.
    Well... Can't see where you live on my phone. In freezing areas they add up to 10% ethanol which absorbs water and prevents fuel line freezup. Ethanol has less power than gas=lower fuel econ.
     
  4. Jun 29, 2010 at 12:45 PM
    #4
    wiscdave

    wiscdave Lets Do It!

    Joined:
    Mar 20, 2008
    Member:
    #5392
    Messages:
    2,543
    Gender:
    Male
    Northern Wisconsin
    Vehicle:
    Tundra Rock Warrior
    Past ride - 3" OME 885s&Shocks/ TSB 1.5AAL/ AX184 Rims 285 Firestone destination ATs/ 2 Shallow mount P310s in Supercrew Box - Punch 601s, Beefed up Hunter Brush guard, Tint, Fog light mod, AFE Drop in, AC and Fog light mods, scangauge
    Truck runs richer in the cold weather.
     
  5. Jun 29, 2010 at 1:24 PM
    #5
    ToBeFrank

    ToBeFrank Member

    Joined:
    May 21, 2010
    Member:
    #37552
    Messages:
    8
    Gender:
    Male
    It requires the same amount of energy to move the truck. Less oxygen per volume means less energy per volume. You'd have to open the throttle more to get the same amount of energy.

    Not true. Modern fuel controllers compensate for air temp and keep the AFR the same.
     
  6. Jun 29, 2010 at 2:40 PM
    #6
    Kyouto42

    Kyouto42 Iron Beard

    Joined:
    Aug 18, 2008
    Member:
    #8614
    Messages:
    9,243
    Gender:
    Male
    First Name:
    Jake
    Ahwatukee, AZ
    Vehicle:
    BSP '10 4x4 TRD Off-Road DC
    See build thread in signature
    This.
     
To Top