What grade gasoline do you use

[priussoris]

Do you use reg. unleaded super unleaded premium unleaded and what station is seems to give better mpg.


We use Casey gas station Super unleaded have tried the 3 cents off gimmick at walmart but mpg goes way down. Now when we had our car filled at the dealers lot ( twice ) we have gotten the best mileage 55-57 mpg.
So do dealers get the better gas no water in tank??

[cc9150]

<div class='quotetop'>QUOTE(priussoris @ Apr 13 2007, 07:09 AM) [snapback]422484[/snapback]</div>

Do you use reg. unleaded super unleaded premium unleaded and what station is seems to give better mpg.
We use Casey gas station Super unleaded have tried the 3 cents off gimmick at walmart but mpg goes way down. Now when we had our car filled at the dealers lot ( twice ) we have gotten the best mileage 55-57 mpg.
So do dealers get the better gas no water in tank??
[/b]

by "super unleaded" do you mean 93 octane?

Why?

[SunnyvalePrius]

I use 87 octane. It's the cheapest, and it's what's recommended by Toyota. I'm not aware of any rational reason for using any other grade.

My understanding is that a higher octane rating is only useful to prevent knocking in a high compression engine. Since the Prius engine won't knock with 87, buying higher octane gas has no useful effect.

[priussoris]

<div class='quotetop'>QUOTE(cc9150 @ Apr 13 2007, 05:10 AM) [snapback]422485[/snapback]</div>

by "super unleaded" do you mean 93 octane?

Why?
[/b]

here we have 87, 91,93 octane
it seems that we get more miles per tank which equals more mpg when we use super unleaded or (91)
average tank miles are 490-510 if we use that grade
when we used the 87 at wallyworld miles per tank dropped to 389-420 (87) a big difference to me

same driving pattern nothing different but gasoline and different station

walmart is Murphy oil BTW not sure what Casey is

[cireecnop1]

<div class='quotetop'>QUOTE(priussoris @ Apr 13 2007, 05:39 AM) [snapback]422492[/snapback]</div>

here we have 87, 91,93 octane
it seems that we get more miles per tank which equals more mpg when we use super unleaded or (91)
average tank miles are 490-510 if we use that grade
when we used the 87 at wallyworld miles per tank dropped to 389-420 (87) a big difference to me

same driving pattern nothing different but gasoline and different station

walmart is Murphy oil BTW not sure what Casey is
[/b]

Our gas is 85,87,and 91......and I know of 105 but its on the hush hush.

I use 91, yea yea, I know everyone says that it has no useful effect on an engine designed for 85 or 87, but thats ok. I figure if it takes more to refine 91octane then it does to refine 85 then it should be essentially free of "fillers" or whatever you want to call it. And even if someone on here"KNOWS" that 91 has ABOLUTELY no benefit to my engine I will still continue to use it. I always have and always will.

let the comments begin!

[Prius The First]

I have always put mid-grade into the Prius at 4300 miles.

Low-grade in my 1990 Volvo with 173,000 miles

Premium in the Porsche 911SC at 86,000 miles

That said I guess we get all three.

[SunnyvalePrius]

<div class='quotetop'>QUOTE(TomorrowMatters @ Apr 13 2007, 05:13 AM) [snapback]422501[/snapback]</div>

Our gas is 85,87,and 91......and I know of 105 but its on the hush hush.

I use 91, yea yea, I know everyone says that it has no useful effect on an engine designed for 85 or 87, but thats ok. I figure if it takes more to refine 91octane then it does to refine 85 then it should be essentially free of "fillers" or whatever you want to call it. And even if someone on here"KNOWS" that 91 has ABOLUTELY no benefit to my engine I will still continue to use it. I always have and always will.

let the comments begin!
[/b]

That's great! I wish more people had that kind of self confidence. It would help me with my new business. I'm selling special premium and super-premium grade dollar bills. The premium is only 10 cents more than the standard dollar bill and the super-premium is only 20 cents more.

[Betelgeuse]

<div class='quotetop'>QUOTE(TomorrowMatters @ Apr 13 2007, 07:13 AM) [snapback]422501[/snapback]</div>

Our gas is 85,87,and 91......and I know of 105 but its on the hush hush.

I use 91, yea yea, I know everyone says that it has no useful effect on an engine designed for 85 or 87, but thats ok. I figure if it takes more to refine 91octane then it does to refine 85 then it should be essentially free of "fillers" or whatever you want to call it. And even if someone on here"KNOWS" that 91 has ABOLUTELY no benefit to my engine I will still continue to use it. I always have and always will.

let the comments begin!
[/b]

It seems to me that you have a fundamental misunderstanding of the difference between the different octanes. It is *not* the case that a 91 Octane is somehow "purer" than an 87 Octane.

But, you're going to continue to use it, no matter what arguments are put to you, so I'll just link to the Wikipedia article on Octane for anyone else that wants to inform themselves.

[excuseMeButt]

If it makes you feel better to use the higher octane gas...go ahead and use it. The gas companies need to get rid of it anyway. Despite you thinking it is a better grade of gasoline, it is really just the stuff that is swept up from the cutting room floor.

Oh, wait...that's menthol cigarettes.



~buttster

[cc9150]

<div class='quotetop'>QUOTE(priussoris @ Apr 13 2007, 07:39 AM) [snapback]422492[/snapback]</div>

here we have 87, 91,93 octane
it seems that we get more miles per tank which equals more mpg when we use super unleaded or (91)
average tank miles are 490-510 if we use that grade
when we used the 87 at wallyworld miles per tank dropped to 389-420 (87) a big difference to me
[/b]

but 93 octane gas costs more, so you're paying more to get more mpg???

Have you calculated the cost per mile for each grade of gas?? mpg doesn't mean anything if you have to pay more for each mile.

if I could give you 100mpg but you'd have to pay $1000 for each tank of gas, you shouldn't do it.