E10 killing fuel mileage
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
Please let me know where you are, so I know were not to be.
Postmaster
Joined: Oct 2006
Posts: 4,171
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From: SE Texas
Ford made changes to the fuel's stoich value in the programming around '05. My F250 had the stoich value in the PCM as 14.64, but the Excursion was 14.2. It's not gonna make much of a difference-the adaptive strategy will shift the STFT's and LTFT's to meet the stoich of whatever fuel you're using.
I lose 1-1.5 mpg in either vehicle when using E10 fuel.
JL
I lose 1-1.5 mpg in either vehicle when using E10 fuel.
JL
Senior User
Joined: Oct 2008
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in utah there are a few stations that don't have the ethanol, i do try to get my fuel there. if i'm in a crunch and have to get the crap with ethanol i carry heat in the truck cause the second it goes in the thing starts running funny, popping, spitting and sputtering. and i thought that the ethanol was supposed to cost us less? but here its more expensive. i even figured it out. in town with the bias ply's and everything i get right at 9 mpg with "good" gas, with 10% ethanol i get closer to 6.5 to 7 mpg. and when i had my neon going through nebraska we got 17mpg on the ethanol and on good gas we got 23mpg.
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
Actually in one of my manuals it says it's good up to E85, however, in the other manual it says it's only good to B5. So I'm not too sure about the E10 or not.
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
That's probably right given the year model that we are dealing with. Newer ones I'm sure all have a higher threshold. Just like I believe all the newer diesels are able to do up to B20 while the ones with roughly the same model years as y'alls gassers are B5.
Posting Guru
Joined: Jan 2003
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From: PA
My mileage dropped from 17MPG highway at 80mph to 13.5 mpg with e10 being the only difference. The motor also seems semi lame, not as powerful as before even with 37K on the odo. I always tried to get fuel without ethanol blends, but now everyone has it. If the higher octane fuel doesn't have the ethanol as stated before, I may have to try using that instead.
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Cargo Master
Joined: Jun 2008
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From: Stillwater, OK
and i thought that the ethanol was supposed to cost us less? but here its more expensive
if ethanol corresponds to a drop in the price at the pump it is because of government subsidies to the refineries and such to make it so they can sell it at a lower cost... But that doesn't mean you're not paying for it.
Posting Guru
Joined: Aug 2008
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From: Sunny, Snowy, CO
Last time I got 7.5 I was grossing 25,000 in hills. I did get 6.3 one time, but I was idling all day long. Only shut it off for lunch.
I have backed it down allot since I don't haul in such a time crunch like I was then, but when I did that it was 7.5-8 depending on wind drag and how hard I pushed it.
So ChargersFan, what MPGs does your 6.4 see at 25,000 in hills or running 85 and 90 towing 10K ( 17K gross)?
I have backed it down allot since I don't haul in such a time crunch like I was then, but when I did that it was 7.5-8 depending on wind drag and how hard I pushed it.
So ChargersFan, what MPGs does your 6.4 see at 25,000 in hills or running 85 and 90 towing 10K ( 17K gross)?
Cargo Master
Joined: Apr 2007
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In my experience it is normal for mileage to go down when ethanol is mixed with gasoline. I assumed this was mostly due to different burn rates and what position the piston is in when peak cylinder pressure is obtained?
E85 is a completely different story. If used in a flex fuel vehicle the mileage will go down with E85 as well. The engine management system can alter timing and fuel delivery but compression ratio needs to stay compatible with gasoline. I don't know any people that built an ethanol engine for fuel economy, but I do know people that did it for the extra power. You can make some monster street engines on E85. If it can make more power then you should be able to get better fuel economy as well.
E85 is a completely different story. If used in a flex fuel vehicle the mileage will go down with E85 as well. The engine management system can alter timing and fuel delivery but compression ratio needs to stay compatible with gasoline. I don't know any people that built an ethanol engine for fuel economy, but I do know people that did it for the extra power. You can make some monster street engines on E85. If it can make more power then you should be able to get better fuel economy as well.
Posting Guru
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From: Trenton, MI
Cargo Master
Joined: Apr 2007
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I just had a co-worker go on a rant about the same thing the other day. What people forget is the path to find alternative fuels is a path of experiment and discovery. It's less important what the intermediate solutions are, and more important that people keep trying to find a good solution.
Posting Guru
Joined: Jan 2008
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From: Trenton, MI
Well that what make me try straight gas 100%.
Could notice performance difference it got 15 mpg cruise 80-90 mph in 95 F250 with 351W with 1K pounds on flatbed.
When I buy cheap E10 it got 13-14 mpg but little sluggish if I can feel.
I don't understand why they decided to force one gas station that I used to get straight gas turn to E10 now.
Could notice performance difference it got 15 mpg cruise 80-90 mph in 95 F250 with 351W with 1K pounds on flatbed.
When I buy cheap E10 it got 13-14 mpg but little sluggish if I can feel.
I don't understand why they decided to force one gas station that I used to get straight gas turn to E10 now.
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
I just had a co-worker go on a rant about the same thing the other day. What people forget is the path to find alternative fuels is a path of experiment and discovery. It's less important what the intermediate solutions are, and more important that people keep trying to find a good solution.
Alternatives are going to have to happen(more then likely will happen) as oil from our perspective is finite, now from a geological standpoint it's renewable, but we would long since be dead and cold waiting on that.