Thread: [info][opinion] e85

^^^^ exactly... its kinda like Viagra... not alot of people know how it works, they just know it does work...

maybe... maybe not... theres really only one way to know

I have read so much information over the years about ethanol it hurts to talk about it anymore. I can find a site that contradicts another site, US department of Energy, iowa renewable fuels, lab tests the list goes on. There are sources that say the blend varies from 70-79% ethanol then sites that say it's 51-84% ethanol. U.S. government sources that say it has a 100-105 AKI octane rating then other sources/agencies that say 104-109 AKI. I could have sworn I read/heard it somewhere years ago that it is a requirement to post the minimum octane. Seeing so much information and valid resources contradict each other is not easy to sift through.

I have a thread I created a year ago with sources at that time: http://www.grandprixforums.net/e-85-thread-49124.html

Ethanol 113 octane-
Iowa RFA

E85 octane ratings-
Iowa RFA
Iowa RFA
http://www.ethanolrfa.org/page/-/rfa...01.pdf?nocdn=1

http://iqlearningsystems.com/ethanol...cteristics.pdf

This one kinda wraps all the findings together- (shows a ron+mon/2 where the number could be 96 to 112... lol)
http://growthenergy.org/images/repor...rkignition.pdf

Table 3.3. Ethanol and gasoline octane numbers.
Property Ethanol Gasoline
RON 102-130 90-100
MON 89-96 80-92
(RON+MON)/2 96-112 85-96
Blending RON 112-120 90-100
Blending MON 95-106 80-92

I notice a lot of that is for Iowa though so would it be valid in other parts of the country?

Plus, another thing I have yet to get any conclusive evidence of, is what gas the ethanol is blended with. At first, I figured if you just take the AKI rating of ethanol, figure out the octane of the blended fuel, find the actual blend of the e85 and do the math to figure it out. But NOWHERE can I find what fuel they blend the ethanol with. so they could be very easily blending it with like an 80 octane. Or, it could be the 87... So there is just too many variables that are just unknown to have a 100% conclusive answer. The reason I support the ~96 octane over the higher one is that it there seems to be more scientific baking for it (and my roomate did a project on it for chemistry and I used a bunch of his research that I cant find on the net honestly).

So I guess its really just a mystery lol :/

Originally Posted by gtpsleeper

I notice a lot of that is for Iowa though so would it be valid in other parts of the country?

Plus, another thing I have yet to get any conclusive evidence of, is what gas the ethanol is blended with. At first, I figured if you just take the AKI rating of ethanol, figure out the octane of the blended fuel, find the actual blend of the e85 and do the math to figure it out. But NOWHERE can I find what fuel they blend the ethanol with. so they could be very easily blending it with like an 80 octane. Or, it could be the 87... So there is just too many variables that are just unknown to have a 100% conclusive answer. The reason I support the ~96 octane over the higher one is that it there seems to be more scientific baking for it (and my roomate did a project on it for chemistry and I used a bunch of his research that I cant find on the net honestly).

So I guess its really just a mystery lol :/

84.5 octane is common.

i would love to switch over but there is no where i mean no where in my area that even sells it, i didn't know anything about it until i came on this forum

Theres a rumor somewhere around me is going to start selling E98? FTW!

Originally Posted by JoRoW99

Theres a rumor somewhere around me is going to start selling E98? FTW!

they put a pump in here in Lawrence only problem is with the drought the owner wont be putting any in for a while.... such a cock tease to see an e100(98) button next to the e85 when I fill up...

Can Flex fuel vehicles even run that?

nope...

the only ones I know of that are able to do e100 outside the states are in Brazil...?

really? Ive never noticed that huge of a change (AFR wise) when they switch here... last winter I had to take 2* of timing away at wot but that was really it as far as changing the tune and stuff.

you tune in OL?

Why why why is this stuff still not readily available up here in MA!! Grrrrr