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Tractor Talk Discussion Forum

e-85 fuel

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n8terry

05-29-2005 20:55:32




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From what I have been able to learn, using 10% ethanol blend will lower your mileage around 5 to 10 percent.

Can anyone tell me how much lower the mileage would be using e-85 which is 85% ethanol?

I know this is off topic, so don't beat me up.

E-85 is starting to be offered locally for 1.50 a gallon so I am trying to figure out the bottom line cost.




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nwb

05-30-2005 19:20:59




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 Re: e-85 fuel in reply to n8terry, 05-29-2005 20:55:32  
I was looking at Chevy trucks awhile back on fuel economy.gov. It seemed like the engine I was looking at was rated 15-19 mpg. The same ffv engine was 9-10mpg. Anyway you can use fueleconomy.gov for a resource.



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MarkB_MI

05-30-2005 04:57:54




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 Re: e-85 fuel in reply to n8terry, 05-29-2005 20:55:32  
I have compared mileage between E85 and regular. I was surprised to find that I my mileage with E85 was only about 10 to 15 percent less than with regular. I expected it to be much worse. A few comments:

1. My results were in a vehicle set up to run E85. Don't try to use E85 unless your vehicle has a manufacturer's placard that says it's OK to run E85.

2. The percentage of ethanol in E85 varies seasonally. 85 percent is the maximum; in the winter I think it's more like 70 percent. So I would expect to get a little better E85 mileage in winter (versus summer E85).

3. The reason you can buy E85 cheaper than regular is that E85 is subsidized. This varies by state. Here in Michigan it's not subsidized and it costs around three bucks a gallon.

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Leland

05-30-2005 04:50:06




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 Re: e-85 fuel in reply to n8terry, 05-29-2005 20:55:32  
Terry I have been using E-85 for about 8 weeks now and the fact is my 01 S-10 was getting 20-22 on gas and on E-85 milage dropped to around 15-16 depending on outside temps, I added it up and at 1.70 per gal it costs about .12 per mile on E-85 and a dime a mile on gas so E-85 is not much better but my little 2.2 is a little more peppy on the alcohol than gas but don't try towing with E-85 truck will fall on it's face E-85 does not have the energy to produce power needed to really work truck.

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Coloken

05-30-2005 01:59:43




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 Re: e-85 fuel in reply to n8terry, 05-29-2005 20:55:32  
I go with Jon. Think the 5 or 10 percent reduction is for the E85. I have used E10 for years. Never noticed any reduction. Like said, could be because it keep things clean. I tried E85 in my non listed Dakota--seemed to like it, but might have been a little "cold blooded" on a cool morning. But my local COOP charged 2.10 gal, same as regular, So no reason to use it. I run and have run the 10 percent stuff for years but don'r run any field tractor now, so can't tell about them.Figure every time I fill up, I burn up a few bushell of corn to help the farmer.
Kenny

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Dean Barker

05-29-2005 21:33:13




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 Re: e-85 fuel in reply to n8terry, 05-29-2005 20:55:32  
I agree with Gerald, I don't see a mileage reduction using 10% ethanol in a computer controlled fuel injected engine. I did see a 1 to 2 mpg reduction when using 10% ethanol in an older carbureted engine car. I have heard there is a 2 to 3 mpg reduction when using E-85 ethanol.



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Gerald J.

05-29-2005 21:04:15




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 Re: e-85 fuel in reply to n8terry, 05-29-2005 20:55:32  
I don't see that 10% loss using e-10. My truck runs smoother on E-10. I use E-10 most all the time in Iowa. Its cheaper than straight gasoline. The computer controls the injectors just fine.

Unless your vehicle is a Flex Fuel Vehicle, you don't burn e-85 in it without the chances of doing damage. It does take more and the injectors can't supply enough at full throttle. Leaning the mixture can burn pistons. Then E-85 can be harder on gaskets in the fuel system.

5 years ago UTex converted a Chevy truck and the main change was larger volume injectors. They also changed some of the gaskets and moved the fuel pump out of the gas tank and added a better flame arrestor for the filler opening believeing that the atmosphere above the fuel with e-85 was more combustible than that above gasoline.

EPA and CARB don't want vehicles to be converted to run on E-85 because they think the emissions will be made worse but they like factory option e-85 vehicles.

More than ecomonics is the principle of not burning imported gasoline. Burning e-85 (or e-10) is good for us corn farmers.

Gerald J.

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Jon H

05-29-2005 22:42:41




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 Re: e-85 fuel in reply to Gerald J., 05-29-2005 21:04:15  
Ethanol has aprox 30% less heat energy than gasoline. With a blend of 10% ethanol 90% gasoline,in theory your fuel has at most 3% less energy per gallon. I have also never seen a mpg drop when burning E10. I suspect the cleaning action of ethanol improves the efficiency of fuel system parts,valves, combustion chamber and sparkplugs,to more than makes up for the slight btu drop.



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edchainsaw

05-30-2005 20:55:31




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 Re: e-85 fuel in reply to Jon H, 05-29-2005 22:42:41  
during the first Ethanol wave back in the 70's I rember getting BETTER economy with it.

our CO_op (used loosely) did not sell ethanol for almost 20yrs.. ( just started again last month I think) so I have been buying from CASEY's when I was in town.... just to use something from the USA



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