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1 part 87 + 2 parts 93 = 91

Old 11-03-2008, 06:44 PM
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1 part 87 + 2 parts 93 = 91

I don't know what the deal is, but the price of regular has been falling a lot faster than premium, resulting in a 40-60 cent differential between 87 and 93 octane. So, I save about $2 a tank by swiping my credit card twice. Does anyone else do this?
Old 11-03-2008, 07:10 PM
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octanes do not mix on a a proportional scale.

50% 87 and 50% 93 is not 90. its more like 92.

afaik.

and no i dont do that.
Old 11-03-2008, 07:12 PM
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the octane listed is at least the rating given, it also might be higher.
Old 11-03-2008, 07:33 PM
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I use shell v-power.

One time a hurricane stopped the supply of fuel for over a week and I had to use 89. I heard some predetonation going on around the 6,000 RPM mark. Didn't get above 3,000 RPM after that until 93 was sold again.
Old 11-03-2008, 07:40 PM
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I have a 14 cent differential here. $1.91 regular and $2.05 premium
Old 11-03-2008, 07:41 PM
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you mean 2.91 regular and 3.05 premium?

no way are you paying $2/gallon for premium. thats just crazy.
Old 11-03-2008, 08:11 PM
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Originally Posted by kersh4w
octanes do not mix on a a proportional scale.

50% 87 and 50% 93 is not 90. its more like 92.
Would you care to elaborate? If you were combining isooctane and heptane mixtures, then mixing octanes most certainly would be proportional -- by definition. I suppose actual mixtures might vary somewhat, but I wouldn't think it would be that much.
Old 11-03-2008, 08:28 PM
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To save 2$? Lol? Are you that cheap?
Old 11-03-2008, 11:23 PM
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Originally Posted by j8635621
I have a 14 cent differential here. $1.91 regular and $2.05 premium


uh.... thats amazing. im paying $3.03 for premium, and it was at$ 4.50 ish a week ago
Old 11-03-2008, 11:52 PM
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Originally Posted by DarkLord7854
To save 2$? Lol? Are you that cheap?
bwahaha rly tho
Old 11-04-2008, 12:17 AM
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its cheap in texas, the gas station near me has regular for 1.90 and premium is like 2.13 or something.
Old 11-04-2008, 06:33 AM
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im paying 2.40 for premium in the expensive island/tourist areas on the FL coast. I know inland a bit it can get down to 2.20ish for premi, under 2 for regular. FL ftw, cheap gas and 80 degrees in nov.

and im not going to go through that to save 2$. i could drive less agressively and save more than that if i wanted.
Old 11-04-2008, 06:37 AM
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Originally Posted by PBlue
im paying 2.40 for premium in the expensive island/tourist areas on the FL coast. I know inland a bit it can get down to 2.20ish for premi, under 2 for regular. FL ftw, cheap gas and 80 degrees in nov.

and im not going to go through that to save 2$. i could drive less agressively and save more than that if i wanted.
$2.36 is the average for regular in FL.

http://www.floridastategasprices.com/

Attached Thumbnails 1 part 87 + 2 parts 93 = 91-ch.gaschart.gif  
Old 11-04-2008, 06:37 AM
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Originally Posted by DarkLord7854
To save 2$? Lol? Are you that cheap?
$2 in 30 seconds? That's $120 an hour - tax free. Yep, I'm that cheap.
Old 11-04-2008, 07:19 AM
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We have a .21 cent difference here in Ohio. Regular today was 1.97 . I wonder what will happen after the election settles down or if it has any effect.

Take care,

Brian
Old 11-04-2008, 07:30 AM
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Originally Posted by BBQdDude
We have a .21 cent difference here in Ohio. Regular today was 1.97 . I wonder what will happen after the election settles down or if it has any effect.

Take care,

Brian
no effect. it will just keep going down

We're in recession and there is nothing can stop this.
Old 11-04-2008, 07:34 AM
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I'm serious about my prices lol. It dropped big time and fast. The most I ever paid was 4.05 for premium. Then one day it cost $22 for 3/4 of a tank instead of $45
Old 11-04-2008, 05:04 PM
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wow i guess california is just expensive on gas
Old 11-04-2008, 06:03 PM
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^werd. I payed $5.05 last summer and am paying $3.09 right now... I'm definitely not complaining though
Old 11-04-2008, 06:06 PM
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Originally Posted by HWK11
wow i guess california is just expensive on gas
up here in davis/sacramento it's 2.29 for regular at chevron and shell and 2.49 for premium
Old 11-04-2008, 06:30 PM
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$2.03 here in dallas
Old 11-04-2008, 06:35 PM
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i wished i lived in davis now.. gas in Fremont, Union City, Hayward area is getting better. i only get 76 and the cheapest i got was 2.69 for 87 and 2.89 for 91. they are usually 20cents apart
Old 11-04-2008, 07:17 PM
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i live in danvill and the cheapest i gotten 91 is $2.99 today..
Old 11-05-2008, 05:50 AM
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Originally Posted by RXLogic
$2 in 30 seconds? That's $120 an hour - tax free. Yep, I'm that cheap.
Uhh... its 240/hr, and i guess if you cant multiply, you prob dont make much from your normal job eh?

but aside from that, people wanna complain about gas, i bet any time you've gone out for lunch you could save more than 2$ by drinking water instead of soda, by ordering a different meal, or by being a bad tipper, but do you?
Old 11-05-2008, 09:10 AM
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Originally Posted by PBlue
Uhh... its 240/hr, and i guess if you cant multiply, you prob dont make much from your normal job eh?

but aside from that, people wanna complain about gas, i bet any time you've gone out for lunch you could save more than 2$ by drinking water instead of soda, by ordering a different meal, or by being a bad tipper, but do you?
Or you could not go out for lunch and make your own lunch for even cheaper.. but nope, it's better to skimp out on good quality gas for your car, I mean hell, in the event something goes wrong, at least there'll be plenty of money saved from those 2$ to pay for repairs.

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Quick Reply: 1 part 87 + 2 parts 93 = 91



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