87 octane regular vs 89 octane 10% ethanol

30% hit from ethanol, 10% ethanol so...
multiply regular * 0.97 and that's should be about correct.
for instance, at $2.759 for regular, unless ethanol is less than $2.67623, your probably better off with regular. though this does not count the emissions difference.

someone correct me if i'm wrong.

 

I noticed that price difference when I was driving through Iowa. It was strange for the 89 octane gas (ethanol blend) to be cheaper than the 87. I went with the 87 since the Toyota owners manual seems to say these cars run best on 87.

 

We were driving through IA and NE this summer. The temp in NE was 107 one day. Anyway, I tried the 89 w/ethanol cause it was cheaper. My mpg on I80 went down from 48 to 43 in just a few miles. Surprisingly, in CO the reg was only 85 and the Prius ran like a champ on it, back up to the 48's. as they say, YMMV.

 

just make sure the ethanol blend is just E10, and NOT E85.

But like others said, you'll take a MPG hit when addind ethanol to the gas, since it doesn't contain as much energy. However, a little ethanol is apparently good for things, as it helps keep the engine and pipes, etc clean.

 

<div class='quotetop'>QUOTE(tmorrowus @ Oct 19 2006, 06:50 PM) [snapback]335320[/snapback]</div>

I moved to Panama City several years ago from Wyoming. Most people don't know that 87 octane is the same as 85 octane at high altitude.

With the hit on E10, how can those trucks and SUV's afford to drive on E85? Just glad I traded my 15 MPG Jeep Wrangle for my Prius. My comute is a lot more enjoyable and I use 1/4 the gas to do it. B)

 

<div class='quotetop'>QUOTE(pcflorida @ Oct 20 2006, 08:02 AM) [snapback]335487[/snapback]</div>

That's a somewhat redundant question, since you can ask the same to those owners about gas too.

Nonetheless, a photo like this from Minnesota helps to provide that answer...