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Fuel Efficiency and Slow Driving?

vile8 writes "With the high gas prices and ongoing gas gouging in my hometown many people are trying to find a reasonable way to save gas. One of the things I've noticed is people driving exceptionally slow, 30mph in 45mph zones, etc. So I had to take a quick look and find out if driving slow is helpful in getting better mileage. I know horsepower increases substantially with wind resistance, but with charts like this one from truckandbarter.com it appears mileage is actually about the same between 27mph and 58mph or so. So I'm curious what all the drivers out there with the cool efficiency computers are getting ... of specific interest would be the hemis with MDS; how do those do with the cylinder shutoff mode at different speeds?" Related: are there any practical hypermiling techniques that you've found for people not ready to purchase a new car, nor give up driving generally?

8 of 1,114 comments (clear)

  1. Take advantage of aerodynamics by kbrasee · · Score: 5, Funny

    Do like everyone else does, drive about 6 inches behind me at 65 mph.

  2. jack rabbit starts by Ydna · · Score: 5, Funny

    I'd say the way people blast off from the green light like their in a Formula 1 Grand Prix* is probably doing a bigger number on fuel economy in city driving more than anything else.

    * or not if you were Hamilton yesterday.

    --

    "The great thing about multitasking is that several things can go wrong at once." -me

  3. Re:Fuel economy by mustafap · · Score: 5, Funny

    >not to mention your spigot bearing.

    Is that something a doctor would sort out, or a mechanic?

    --
    Open Source Drum Kit, LPLC deve board - mjhdesigns.com
  4. The leanset way to drive... by i · · Score: 5, Funny

    ..is accelerating relatively fast to something like 70mph,
    then pull of the engine and roll with no gear until You reach
    something like 10mph when You start the engine and repeat.

    This is the empirically show best method.

    But it will probably irritate other drivers...

    --
    Mundus Vult Decipi
  5. Re:Fuel economy by morgan_greywolf · · Score: 5, Funny

    Actually, most cars nowadays with manual transmissions will actually no longer consume fuel.

    Wow! That's wierd. There must be something wrong with my 5-speed Ranger then, because it's constantly consuming fuel. About 24 MPG worth in combined city+hightway.

  6. Re:Fuel economy by BLAG-blast · · Score: 5, Funny

    And when the pilot bearings wears out, it causes vibration on the input shaft to the transmission, which causes the input shaft seal to fail, which let's the oil drip out, which gets on the clutch plate, which causes the clutch plate to slip, which creates heat, which causes the fly wheel to crack, which chews up the clutch plate, which causes the clutch plate to grip, and every thing seems work fine again, for a little while anyway, this is when to sell your car and get a new one.

    --
    M0571y H@rml355.
  7. Re:The Jesus Bearing by Migraineman · · Score: 5, Funny

    The throwout bearing is also known as the Jesus bearing to those who wrench on cars. Usually after rebuilding the engine, installing it in the car, and topping up the fluids, you'll notice the Jesus bearing sitting on top of the toolbox.

  8. Re:Fuel economy by crossmr · · Score: 5, Funny

    isn't this discussion getting a tad too manly for slashdot?