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Old 06-30-2019, 07:06 PM   #11 (permalink)
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Quote:
Originally Posted by 2000mc View Post
While e0 is more energy dense than ethanol, I think the difference between e0 and e10 should be about 3%
In a study looking at mileage with different ethanol blends the general trend follows the energy density. That being said, your mileage will vary, The Ford Fusion tested did almost 15% better on e0 vs e10, while a flex fuel impala did just over 15% better on e20 vs e0.
http://www.speedperf6rmanc3.com/cont...evel_Study.pdf
that's my understanding, and why I'm surprised I'm seeing such a large increase

I realize that each car could act a little different as well as all the testing controls

I probably won't need fuel till this Wednesday (that will be my 3rd full tank)
so it will be a week or so before I get a reading on regular E10 again

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Old 06-30-2019, 07:20 PM   #12 (permalink)
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I don't really have any knowledge to back this up, but maybe older cars would react better to E0 because their ECU programming is less sophisticated, and newer cars are better programmed to handle different grade fuels?

Have you tried E0 in any of your other cars with success?
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Old 07-01-2019, 12:01 AM   #13 (permalink)
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I have found that older gas hogs don't care.
Gas hogs like 4.6l crown vic.
Fuel efficient cars appreciate e0 more.
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Old 07-01-2019, 11:28 AM   #14 (permalink)
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+16% makes me think you found a user friendly pump. When a local station got E15 a few fills I thought I wrote my mileage down off by 100 miles, if I took 100 miles off the tank the average was about right. I eventually figured it out. Using pump reading I was getting 58 mpg vs my normal 40.
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Old 07-01-2019, 01:23 PM   #15 (permalink)
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I tested a few tanks of E0 in my Insight and could not find any discernible difference in economy. I think the math shows it should be around 3%. I might give ethanol-free premium a try with my new engine but I'm not holding my breath.
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Old 07-02-2019, 11:27 AM   #16 (permalink)
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Driving the 2010 Cobalt lately, and using E0-87($2.729) the last 2 tanks, 1st set a new car's best at 39.1, 2nd at 40.09 ($0.069/mile). Fuel is $0.20 more than E10-87 at that station, to match cost per mile E10 would have to get 36.7 mpg, last 2 tanks on E15 were 38.3 & 36.8 or 37.5 average(E15 is $2.43 today at near by station, $0.065/mile)

Last edited by roosterk0031; 07-02-2019 at 03:07 PM..
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Old 07-02-2019, 01:42 PM   #17 (permalink)
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if I'm doing the math right

it looks like "IF" the fuel economy stays about the same,
I'm spending $0.07 / Mile with E-0
I was getting $0.075 / mile on E-10
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Old 07-02-2019, 11:59 PM   #18 (permalink)
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Quote:
Originally Posted by KrautBurner View Post
....I logged the first few tanks averaging about.....44mpg
then switched to NON-ETHANOL Regular (87oct)
the first tank.....got me about 49.5mpg and the 2nd tank got me 51.1mpg
this is a much larger difference than I was expecting....
I have 10+ years of experience with 87 octane 10% ethanol blend (E10) vs. 87 octane ethanol-free gasoline (E0). My 5 low-compression ratio, 87 octane gasoline engines show a percentage MPG increase, E0/E10 of 8%, 8%, 7%-8%, 7%, & 5%. E10 advocates tote the energy difference between E0 & E10 of 3% as showing only 3% MPG gain for E0 over E10. However, the following is important:
87 octane 100% gasoline component (E0) is 87 octane. duh!
Reported in many websites, inaccurate but "designated" 87 octane 10% ethanol blend (E10) has a gasoline component that is 84 octane. Because of great quantities of "ethanol in gasoline industry" propaganda & lobbying to artificially lower E10 prices, American drivers have accepted 84 octane component gasoline to be used (not efficiently burned) in their 87 octane gasoline engines. But, 87 octane E0, as burned properly in an 87 octane, low compression ratio designed gasoline engine, has 8% to 5% better MPG than inaccurate, but "designated" 87 octane 10% ethanol blend, which has neither ethanol component or gasoline component that is 87 octane.
Now the "ethanol in gasoline industry" is pushing inaccurate, but "designated" 88 octane, 15% ethanol-blend (E15). Inaccurate, but "designated" 88 octane ethanol-blend E15 has a gasoline component with an octane of 83.5.
If the "ethanol in gasoline industry" can successfully market inaccurate, but "designated" 88 octane ethanol-blend E15, they will then push inaccurate, but "designated" 87 octane ethanol-blend E15, which has its gasoline component as 82.4 octane. In all cases, the ethanol blends have no fuel components that are 87 octane & all ethanol blends are inefficiently burned.
The magic & power of propaganda to get people to accept products in their lives which are not "efficient" is remarkable.
///////
Glad to see you live in Sequim. I live on the east side of the Salish Sea (Puget Sound). Do you buy your Ethanol-free E0 at Chimacum or Port Angeles? Sorry, you have to pay so much for E0. Its still expensive, but on the east side here, I get my E0 for $3.42.

Last edited by litesong; 07-03-2019 at 12:15 AM..
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Old 07-03-2019, 04:11 AM   #19 (permalink)
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Quote:
Originally Posted by litesong View Post
Glad to see you live in Sequim. I live on the east side of the Salish Sea (Puget Sound). Do you buy your Ethanol-free E0 at Chimacum or Port Angeles? Sorry, you have to pay so much for E0. Its still expensive, but on the east side here, I get my E0 for $3.42.
I get it at R Corner (half way between PA and Sequim)
256421 Highway 101
Port Angeles, WA 98362
United States

They also have premium

I normally get my E-10 premium at the Co-op in Sequim
216 E Washington St, Sequim, WA 98382
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Old 07-09-2019, 02:39 PM   #20 (permalink)
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3rd tank of E-free fuel
Ended up with 49mpg

I filled with regular E-10 to see if it drops back down

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