Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - I want to get to the bottom of this ethanol killing my mpg

Nerys · 10-05-2009, 04:12 PM

well I NEVER saw a difference in oxygenated fuel and regular either,. We are talking about 10% ETHANOL fuel. Not oxygenated fuel ?????

As for being productive. THAT is why I want to find some non ethanol fuel. if I can do an A B A B test type setup I can at least CONFIRM OR DENY "something" is going on with the fuel. MAYBE eliminate fuel as the problem or eliminate mechanicals as the problems.

Thats the point of this thread. TO TEST and Eliminate one or the other. TO DO THAT I need some regular gas to test with. IE run 3 4 tanks of non ethanol and "see" what happens to my fuel economy.

if that shows a difference even though it would take an insane "driving" difference to account for this massive loss I will do a BLIND test on my dad's van. I will fill it up for him instructing him never to fill it and I will randomly switch between ethanol and non ethanol every few tanks and "see" what his numbers do.

if both numbers go up that would be pretty conclusive its THE DAMNED FUEL. if the numbers DON'T go up then its pretty conclusive its my Damned cars.

The metro I am getting would make for a very good test vehicle I think since it only has a 10Gallon tank. I was thinking of putting a 10 gallon fuel cell in the jeep so I could completely switch between fuels to get more accurate data and PRECISE fill and use values. ie I could very easily use precisely say 10 gallons each time. It would not even need to be exactly 10 gallons as long as each time its precisely the same exact amount of fuel.

but to do any of these I need to get or make some fuel without ethanol.

I am thinking of trying to make some gas by adding water to sequester the ethanol and then siphone off the gas. a lot of wastage to make sure I don't get any water in the gas I siphone off but done right I could make 5 gallons or so a day and fill a 55gallon barrel. that would be enough for some "initial testing. Drive for 2 tanks get solid mpg figures then switch to the "clean" gas drive that for 50 gallons get some mpg numbers and then switch back to ethanol gas.

WILL my car run ok on 84 octane? its my understanding this is what the resultant gas will be without the ethanol.

10-05-2009, 04:12 PM	#96 (permalink)
Nerys Grrr :-) Join Date: May 2008 Location: Levittown PA Posts: 800 Cherokee - '88 Jeep Cherokee 90 day: 19.44 mpg (US) Ryo-Ohki - '94 Geo Metro Xfi 90 day: 50.15 mpg (US) Vger 2 - '00 Plymouth Grand Voyager SE Ninja - '89 Geo Tracker 90 day: 30.27 mpg (US) Thanks: 12 Thanked 31 Times in 25 Posts	well I NEVER saw a difference in oxygenated fuel and regular either,. We are talking about 10% ETHANOL fuel. Not oxygenated fuel ????? As for being productive. THAT is why I want to find some non ethanol fuel. if I can do an A B A B test type setup I can at least CONFIRM OR DENY "something" is going on with the fuel. MAYBE eliminate fuel as the problem or eliminate mechanicals as the problems. Thats the point of this thread. TO TEST and Eliminate one or the other. TO DO THAT I need some regular gas to test with. IE run 3 4 tanks of non ethanol and "see" what happens to my fuel economy. if that shows a difference even though it would take an insane "driving" difference to account for this massive loss I will do a BLIND test on my dad's van. I will fill it up for him instructing him never to fill it and I will randomly switch between ethanol and non ethanol every few tanks and "see" what his numbers do. if both numbers go up that would be pretty conclusive its THE DAMNED FUEL. if the numbers DON'T go up then its pretty conclusive its my Damned cars. The metro I am getting would make for a very good test vehicle I think since it only has a 10Gallon tank. I was thinking of putting a 10 gallon fuel cell in the jeep so I could completely switch between fuels to get more accurate data and PRECISE fill and use values. ie I could very easily use precisely say 10 gallons each time. It would not even need to be exactly 10 gallons as long as each time its precisely the same exact amount of fuel. but to do any of these I need to get or make some fuel without ethanol. I am thinking of trying to make some gas by adding water to sequester the ethanol and then siphone off the gas. a lot of wastage to make sure I don't get any water in the gas I siphone off but done right I could make 5 gallons or so a day and fill a 55gallon barrel. that would be enough for some "initial testing. Drive for 2 tanks get solid mpg figures then switch to the "clean" gas drive that for 50 gallons get some mpg numbers and then switch back to ethanol gas. WILL my car run ok on 84 octane? its my understanding this is what the resultant gas will be without the ethanol.