Real world MPG difference from e10 to 100% gasoline.

[Kevinl]

Running e40 in the 335i has made the mileage definitely drop the lead foot doesnt help either

[flyboyx]

in the long run, you are probably better off running the expensive gas. there will be less maintenance on your car, your fuel system components and engine will probably last longer.

its kind of like those food documentaries where you get cancer/ psoriasis/ diarrhea/ ulcers from eating cheap processed shit food. when you eat fruits and vegetables, it all goes away....or something like that.

[varg]

Since a station opened near me with ethanol free regular (which costs the same as E10 premium 93!) I have discovered that my ZRX gets no additional mpg (34-36mpg), but the carbs stay cleaner (less crusty white deposits in the float bowls). Ethanol free 93 octane is non-existent so I can't try it out in my E30, which would probably be better suited for E85, which is not consistently available at the very few stations that sell it around here. I'm an outspoken critic of the ethanol mandate, which is based on flawed logic and lobbying power, and doesn't do anyone any good aside from giganto-farm corn/ag lobbyists and the politicians who take money from them.

[roguetoaster]

Yep, 100%. In cars with more adaptive engines/management it makes slightly less of a difference.

[Wschnitz]

I'm gonna say it will be reproduce-able, especially with older cars. I get at least 2-3 more MPG with non ethanol in my E30.

[Exodus_2pt0]

I drive a little over 500 miles a week, so I track my economy every time I fill up.

The Miata gets roughly 27mpg religiously.

The other day I accidentally filled it with 100%, didn't mean to but I failed to notice that they had 2 87 octane pumps. It was about 30 cents more a gallon, or $3 to fill up.

I got 31mpg out of that fill up.

Next tank, put regular e10 in, and back to 27mpg.

I'm going to try again and see what happens. Anyone else try this?

Funny thing, is it works out to very little difference when breaking it down to miles per dollar.

At 2.09 for e10 I'm getting average 12.8 miles per Dollar.
At 2.39 for e0, it's 12.9 miles per dollar.

I figured that last part mid thread, so I'll continue with it. But I guess the lesson here is that even with my extreme variance in mpg when running gasoline vs ethanol diluted, the end result is still the same.