Real world MPG difference from e10 to 100% gasoline.

[roguetoaster]

Variable compression lol

Probably a Koenigsegg development project already.

[DER E30]

Time to boost your compression, then!

hee

t

Variable compression lol

[TobyB]

Time to boost your compression, then!

hee

t

[noid]

The only source of ethanol free fuel here is 91, wish we had it in 87.

[Exodus_2pt0]

Update. Been filling up on 100% gasoline since starting f this thread.

The car now averages 32.5mpg every tank.

Happy camper here. At the current prices the undiluted stuff is saving me $200 a year over e10. Edit due to bad math.

[TobyB]

AND then there's the problem of keeping alcohol and gasoline mixed- they don't want to.
SO then there's an additive package to do THAT.

Burning alcohol is just fine. Mixing it with gasoline is a fool's errand.

t

[Preyupy]

The primary reason your fuel mileage goes down based on the amount of Ethanol in the fuel is the Stoichiometric Air/fuel ratio for Gasoline is 14.7:1 (This is based on weight not volume) and Alcohol is 6.4:1. Gasoline weighs between 5.8-6.5 pounds/gal and Ethanol is 6.5 lbs/gal so there is not a huge difference in weight/volume but there is the issue of almost 2.3 times the amount of Alcohol by volume to achieve the correct AFR. Adding 10% Ethanol to your fuel should under the best of conditions at the same time cost you 10% more total volume to meet the AFR you are looking for.

Then there is the hygroscopic properties of Alcohol (it absorbs water from the air) and the corrosion (hoses, fittings, gaskets etc) that were not designed to live in a Alcohol environment.

[DER E30]

Now as far as fuel systems go, the S4 is good for it, I'm even running the walbro 450 e85 pump already.

Pump's not the only thing, the rubber lines corrode and turn to goo inside.


My friend was a chainsaw mechanic for Stihl, he said that most issues with them not running was ethanol in the fuel, it kills the carb seals, float bowls, fuel lines. The fuel systems in anything not made in the last few years isn't made for it.

[Matt-B]

Yeah, sadly the closest one is about 40 min away from my house.

could be one close, i added one to that list a while back.
if people dont add it, then its not there. those are just confirmed stations

[Kevinl]

You might have to pull the timing back a bit.

or it might want more timing :)

E85 is a godsend to turbocharged engines especially here where 91 is all we get which is not adequate on a stock turbocharged vehicle

I tried my 335i with a 91 octane tune and it lasted about 20 mins till I went and found an e85 station

[dnguyen1963]

You can too, presuming one of these stations is near enough at hand. http://www.pure-gas.org/index.jsp?stateprov=IN

Yeah, sadly the closest one is about 40 min away from my house.

[djjerme]

You might have to pull the timing back a bit.

[Exodus_2pt0]

I'm honestly afraid to go e85 on the s4 because of the inconsistent tendencies.

There's a station about a half hour away that carries it, but I don't feel like testing and worrying about it going bad in the tank while the car sits?

Now as far as fuel systems go, the S4 is good for it, I'm even running the walbro 450 e85 pump already.

All this talk kind of makes me want to go for it. I will end up throwing a rod eventually (will be around 550awhp/tq), but hey it's not my DD anymore.

[djjerme]

I actually have a CFN account, and it's surprising how many commercial fuel station carry E0 fuels.

We load up the race cars and some of the other cars with it when ever we get the chance. My buddy refuses to run anything but E0 in his 1M (can't say I blame him..)

[M-technik-3]

Yeah I think its ignorant to say Corn fuel doesnt belong in any car engine, Race cars often run E85 or alcohol fuels.

Just old Cars are not meant to run corn.

It's not stretching it out, It would be one thing if you got better mileage on it. It attracts water it causes more damage to fuel systems.

Race Cars cause they truly car about mpg, correct. If they did then they'd be working to go the whole race on one stop. E85 has great resistance to detonation as does Alcohol.

FI cars burn it like a champ but it does not give you better mpg.

And presuming that the list is accurate and not painfully outdated. It's garbage for my area. Prior to the new station opening up down the road for me and offering ethanol free gasoline there was no way to get it anywhere nearby without going to the marina and paying $4/gallon + for marine gasoline.

Our area doesn't sell any E Zero.

I agree with Wschnitz. Ethanol is like a middle ground between gasoline and top fuel. Lower energy density, but also a lower air to fuel ratio. Yes, it will corrode an engine quickly if it's not designed for it, but as long as it's fuel injected with O2 sensors, it should have no problem burning it.

It will burn it but if your system was not designed for it aka E30's with Steel fuel tanks and metal fuel lines....