Does ethanol blended gas gel?

[DEWFPO]

E15 has 40% less energy than straight gasoline,

I smell smoke......

How did you come up with this number?

Depending on the source of the data (in this particular case the US Gov. - Alternative Fuels Data Center), typically :
Neet (100%) gasoline has 116,900 btu's per gallon.
Neet (100%) ethanol has 76,330 btu's per gallon.

Therefore E15 (15% of the ethanol value = 11,450 btu's, PLUS 85% of the gasoline value = 99,365 btu's) equals 110,815 total for E15.

110,815 (E15) divided by 116,900 (E0) equals 94.8% of the btu content of neet (100% gasoline). So a loss of 5.2%, not 40%.

If my numbers are wrong, please correct me and show me the data.

DEWFPO

 

[cmore]

I think its a bad waste of good drinking alcohol to take corn and make it into fuel ;-<()

 

[KYDan]

I smell smoke......

How did you come up with this number?

Depending on the source of the data (in this particular case the US Gov. - Alternative Fuels Data Center), typically :
Neet (100%) gasoline has 116,900 btu's per gallon.
Neet (100%) ethanol has 76,330 btu's per gallon.

Therefore E15 (15% of the ethanol value = 11,450 btu's, PLUS 85% of the gasoline value = 99,365 btu's) equals 110,815 total for E15.

110,815 (E15) divided by 116,900 (E0) equals 94.8% of the btu content of neet (100% gasoline). So a loss of 5.2%, not 40%.

If my numbers are wrong, please correct me and show me the data.

DEWFPO

Ethanol Alternative Fuel | E85 - Consumer Reports

 

[KYDan]

I smell smoke......

How did you come up with this number?

Depending on the source of the data (in this particular case the US Gov. - Alternative Fuels Data Center), typically :
Neet (100%) gasoline has 116,900 btu's per gallon.
Neet (100%) ethanol has 76,330 btu's per gallon.

Therefore E15 (15% of the ethanol value = 11,450 btu's, PLUS 85% of the gasoline value = 99,365 btu's) equals 110,815 total for E15.

110,815 (E15) divided by 116,900 (E0) equals 94.8% of the btu content of neet (100% gasoline). So a loss of 5.2%, not 40%.

If my numbers are wrong, please correct me and show me the data.

DEWFPO

Ethanol Alternative Fuel | E85 - Consumer Reports

 

[3930dave]

I smell smoke......

How did you come up with this number?

Depending on the source of the data (in this particular case the US Gov. - Alternative Fuels Data Center), typically :
Neet (100%) gasoline has 116,900 btu's per gallon.
Neet (100%) ethanol has 76,330 btu's per gallon.

Therefore E15 (15% of the ethanol value = 11,450 btu's, PLUS 85% of the gasoline value = 99,365 btu's) equals 110,815 total for E15.

110,815 (E15) divided by 116,900 (E0) equals 94.8% of the btu content of neet (100% gasoline). So a loss of 5.2%, not 40%.

If my numbers are wrong, please correct me and show me the data.

DEWFPO

I seem to recall E10 at about 6% less energy than pure gasoline. Wik listing seems to agree. The 40% comment may have been wrt. E85 ? Anyway, it is diminished for sure.... personally I'm less than thrilled about the 6% hit from E10.

Energy density - Wikipedia, the free encyclopedia

Rgds, D.

 

[DEWFPO]

Ethanol Alternative Fuel | E85 - Consumer Reports

O.K., so he meant E85 but typed E15. I've made plenty of typos myself, BTDT.

DEWFPO

 

[KYDan]

I will stick with the Consumer Reports and the British Petroleum Institute numbers. They are less than the 40% that I picked up somewhere, I have not been able to relocate the source yet. My memory is good, just short. They show 27% on good proven, trustworthy data. Wikipedia is fine, but not always reliable. We choose to believe what we judge to be the best information available. Ethanol's lower fuel economy results from its lower energy content compared to gasoline. For example, E85 contains 75,670 British thermal units of energy per gallon instead of 115,400 for regular unleaded gasoline, according to the National Highway Traffic Safety Administration. So you have to burn more fuel to generate the same amount of energy. In addition, FFV engines are designed to run most efficiently on gasoline. Some engineers we interviewed say E85 fuel economy could approach that of gasoline if manufacturers optimized engines for that fuel, however. Quoting the Consumer Reports actual study Of the 13 billion gallons of ethanol expected to be produced in 2010 and 2011, less than 2 percent, or 260 million gallons, will be blended into E85. Because our tests show that E85 provides 27 percent lower fuel economy, those 260 million gallons are able to replace only a little more than 214 million gallons of gasoline—a tiny fraction of the 170 billion gallons consumed on American roads every year.

 

[3930dave]

My inner geek has a problem with all the teeny tiny fuel efficiency gains that the factory engineers blow their brains out designing getting wiped out by the stroke of some bureaucrats pen.

Except the corn States, I don't know anybody that is happy about this.

All the new vehicle mpg "official" ratings should be stated in more categories (Gas, E10, E15, E85) - I stand a better chance of winning a major lottery, than seeing that data published.

Rgds, D.