Regarding E85 preformance

Discussion in 'Shop Talk' started by Cheryl in SD, Nov 16, 2006.

  1. Cheryl in SD

    Cheryl in SD Living in the Hills Supporter

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    Is E85 in gas motors equivalent to unleaded in power & preformance? Do they vapor lock in hot weather? If we were to get one, is there anything we should know? How is gas milage, is it comparable to what the vehicle is rated? Is the overall preformance different, better or worse?

    TIA
     
  2. Cheryl in SD

    Cheryl in SD Living in the Hills Supporter

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    Also, the vehicle we are looking at is a 2000 Grand Caravan, 3.3 L V6 165 hp. Does anyone know anything about these vehicles?
     

  3. rambler

    rambler Well-Known Member Supporter

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    Ethanol has slightly less btu per gallon than gasoline, so you will get slightly lower mpg. I'm generally told the E85 needs to be 30-40 cents less than gasoline to make it about equal value.

    If a used vehicle & you live in an area that doesn't use E10 all the time, the fuel system could be kinda varnished up, & the first tank of E85 could plug up the fuel filter. This would be a one-time deal - ethanol does a good job cleaning out the crap in the gas tank.

    --->Paul
     
  4. jgbndaudio

    jgbndaudio Well-Known Member

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    Hello,

    Ethanol has about 10% less BTU's per gallon than gasoline. When running on E85 you'll see roughly a 10% decrease in mpg's. However if E85 is about 10% less at the pump then you're doing about the same price wise. No matter what it's better for the environment and the US economy to use E85 at any price as it burns cleaner and the money you spend on it mostly stays here in the states instead of going overseas to countries that may not have our best interests at heart.

    However, an even better choice would be to buy a diesel because right off the top, they get 20-40% better milage over a gas powered vehicle and can run on domestically produced biodiesel with a much smaller loss of mpg's percentage wise. Also it's very easy to make your own BD. BD is also more cost effective to make than ethanol because it requires much less energy usage to make.

    Scotty




     
  5. tiogacounty

    tiogacounty Well-Known Member

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    Cheryl, Consumer reports just did some real world testing using a Ford Expedition. With all factors being equal, the vehicle got 27% less mileage when running E85. I know the 10 % figure is often quoted, but I would tend to doubt it. As for the Caravan, I live in a neighborhood where several of the families have been running Caravans since the late 80s, early 90s. In the past they had transmission issues, which were corrected around 2000. They tend to be reliable and run a long time. One neighbor regularly gets 250-300K on theirs in a 7-8 year time frame. They then park 'em in the yard, with a for sale sign and find a low mileage unit, two or three years old, and start again. They replaced one trans out of three vans with a combined total of at least 600-700K miles. I would say that's pretty good service. Arround here the van your looking at could be had for as little as $3or4K depending on mileage and condition. BTW, If you buy it, think about a set of four used rims and four of the newer style snow tires, like bridgestone Blizzaks. It will make it virtually unstoppable in snow, and a lot safer on ice. We run a 2000 Intrepid with this set-up and it is amazing in snow. Good luck
     
  6. cfabe

    cfabe Well-Known Member

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    You'll likely experience more than a 10% reduction in fuel economy. The 10% number is based on the btu/lb of the fuel, but ethanol is a much higher octane fuel and needs a higher compression engine to burn to maximum efficency. The current E85 vehicles while they can run on E85 are designed to run most efficiently on gasoline because the vast majority of them will never see a tank of E85, thus they have lower compression engines and aren't as efficient on E85 as they could be. So figure more like 20-30% fuel economy hit, and remember this will decrease your driving range, too.
     
  7. fantasymaker

    fantasymaker Well-Known Member

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    If you feel like building a moter optimized for E=85 you will very likely get better mileage than with regular gas.Its the higher compression that is the secret to both E-85 and Deisels