What gas station do you fill up at?

Chevron; Shell; Mobil are on the list. Check it out for more info at " Top Tier Gasoline " .

 

I fill up at the station near the freeway on ramp. It's about a mile from where I live. I can give you directions if you want.

 

So rather than bump an ancient thread:
87 vs. 91 Octane MPG and Performance | Page 2 | PriusChat

It's about Octane 87 vs. 91, and prius c can run 87 and no more than 10% ethanol.
But I contacted a few companies and they said that, for a few local stations, they have no ethanol in the 91 premium gas.

So, what do you guys recommend: octane 87 with ethanol, or Octane 91 without ethanol?

 

As a purely mathematical exercise...
Ethanol has 2/3 the energy of gasoline. So E10 has 96.7% the energy content of pure gasoline.
(2/3 x 10%) + 90% = 96.7%

91 octane typically costs 20 cents more than 87. So with regular costing $4/gallon, you can purchase 95% of a gallon of 91 octane gasoline.
$4/$4.20 = 95%.

Therefore E10 buys you more energy when regular gasoline is $4 a gallon. 91 octane is favored once gasoline costs above $5.80/gallon, assuming 91 still costs 20 cents more.
$5.80/$6.00 = 96.7%

All this is just math, I don't know what real world fuel economy is. Car and Driver recorded lower fuel economy on a V6 Accord on their tests running on premium vs. regular.

 

In my old 2001 Saturn, I noticed a hit of 10% or about 3-4 mpgs when I went from no Ethanol to E10. Did you factor that in or just going with the generic 96.7%.

 

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Whatever works

 

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The only way to roll.

 

+1 to this

 

For the time being, I do not support Shell.
I contacted the company and they were courteous enough to respond. Shell rep. said that all of their fuel contains 10% ethanol, except if a local retail station says otherwise. I called a local retailer a long time ago, and they said that their gas contains 11%-14% ethanol. Apparently Shell is "obligated" to put 10% ethanol in their fuel.
Meanwhile, Irving has 10% ethanol in their 87 octane and none in their premium, so I would rather support Irving than Shell.
We don't have Chevron here.

 

A little gloating follows: I've had my Prius Plug In since January 24th. Only one gas fill up (March 3rd) since purchase. I can't remember.

 

Seems a poll is in order for this subject, two opinions, yes gas is better on the other side of the fence, no gas is gas...

I'm a no, but ethanol is subjective, is it 10 or 15%, it's not the gas it's the corn