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Old 06-10-2011, 02:10 PM   #51
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This is a great thread because I have wondered a lot of these things. So a couple of people have stated that 93 or 91.....no difference. Does anyone have proof such as Dyno's or 1/4 times that can confirm to challenge this argument? The manual states 93 preferred right?? I assume they did some testing before publishing that.

I have only ever put 93 shell V Power in my tank and am scared to death to try anything else. Something that bothers me is the brand of gas. I've been told that Shell is the BEST and WORST equally. Does anyone really have a clue?

Fascinating......
All gas stations get their gas from the pipeline, it is all basically the same gas. Shell puts in a gallon on one end and immediate takes out a gallon on the other end. It is not the same gallon they produced, it is from any other refiner. Actually here in Florida Citco makes 40% of the fuel delivered to gas stations in Florida. I can tell you Citco is at most 5% of the stations. Then each brand puts their additives in. There is not much difference between any of the "Top Tier" Brands. If fact when you talk premium gas there is not much different in any brand.
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Old 06-10-2011, 02:14 PM   #52
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All gas stations get their gas from the pipeline, it is all basically the same gas. Shell puts in a gallon on one end and immediate takes out a gallon on the other end. It is not the same gallon they produced, it is from any other refiner. Actually here in Florida Citco makes 40% of the fuel delivered to Florida. I can tell you Citco is at most 5% of the stations. Then each brand puts their additives
in. There is not much difference between any of the "Top Tier" Brands. If fact when you talk premium gas there is not much different in any brand.
Outside of needing 93 for my blower.. honestly, I worry more about a shoddy station's storage and pumping systems and them pumping water and other contaminants in to my car than brand.
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Old 06-10-2011, 02:20 PM   #53
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Outside of needing 93 for my blower.. honestly, I worry more about a shoddy station's storage and pumping systems and them pumping water and other contaminants in to my car than brand.
I can agree with that, If the equipment at the station is old I'll avoid it. They recently had a wave of inspections around here, I can't tell you how many stations had to close until they replaced their storage tanks, and some of them the pumps. I think 1/3 of the stations on my drive home closed at the same time to replace their tanks!
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Old 06-10-2011, 02:22 PM   #54
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I filled up my tank today at a Sunco station and the difference between 91 and 93 was 3 cents per gal. I just used the 93.
The local Sunoco here has 93 and 91 priced the same as 89 on Sundays only. Local Mustang GT guy tipped me off to this. You bet your A$$ I fill up with 93 every Sunday. Normally it is 20 cents more than 89 and 5 cents more than 91. Right now it is $4.05 but "only" $3.85 on Sunday.
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Old 06-10-2011, 02:24 PM   #55
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I can agree with that, If the equipment at the station is old I'll avoid it. They recently had a wave of inspections around here, I can't tell you how many stations had to close until they replaced their storage tanks, and some of them the pumps. I think 1/3 of the stations on my drive home closed at the same time to replace their tanks!
Had an argument a long time ago at a station while I was still active in Scouting. The pump was actually spitting out water over gas due to leakage... Too late for us though as the damage to our bus was already done. Took several hours of labor in a parking lot and a couple trips to an auto parts store to fix the issue.
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Old 06-10-2011, 03:36 PM   #56
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Crude oil prices increasing and environmentalists.
that could be part of it, but what I've overheard some people talking at this table a couple of years ago was that one of the oil companies has a patent to make cheap octane and no one wanted to pay the royalties.
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Old 06-10-2011, 09:24 PM   #57
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My measured mpg is about 2 mpg less always with the 10% ethanol. I checked this out back when we used to have the ethanol blend in the winter but not in the summer. It decreases our mileage 10%! I know those of you in the midwest connected with raising corn don't like to hear that but it's the facts! Ethanol is the biggest waste of time, money and energy there ever was.
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Old 06-10-2011, 09:39 PM   #58
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i take a trip every weekend to the Indian rez and get 93 for $3.91/gal , about same price 87 is at other stations around here.
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Old 06-10-2011, 09:42 PM   #59
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I use 93 only but, i'm right about at sea level and it's pretty hot here most of the year. To be honest right now i need very bit of the octane. The heat and humidity here has taken a bit of a toll on my acceleration as of late. Is it required? No. But, i want it.

I'd kill for a station anywhere near my driving path to have non ethanol blend. Nothing within 25 miles of me :(
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Old 06-11-2011, 08:23 AM   #60
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I use 93 only but, i'm right about at sea level and it's pretty hot here most of the year. To be honest right now i need very bit of the octane. The heat and humidity here has taken a bit of a toll on my acceleration as of late. Is it required? No. But, i want it.

I'd kill for a station anywhere near my driving path to have non ethanol blend. Nothing within 25 miles of me :(
Where are you, exactly? I know of a few places in pinellas that have it. One of them only a few minutes from the Howard Franklin. Check out the website for ethanol free, I forget the name but you can google it.

And yes, ethanol is the biggest vote buying scam waste of money yet. The only people I've ever seen support it are corn growers and their kin. If it is that great, why does it have to be subsidized? And, e-85 that everyone wants because it is cheaper actually ends up being more expensive because mpg drops so much.

And E-10 does reduce mileage. Do you really thing the EPA redid their ratings a few years ago to better reflect the real world? Lol! Before E-10 and the new EPA ratings, I always got better mpg than what my vehicle was rated for, now I get worse.
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Old 06-11-2011, 08:44 AM   #61
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Where are you, exactly? I know of a few places in pinellas that have it. One of them only a few minutes from the Howard Franklin. Check out the website for ethanol free, I forget the name but you can google it.
If your in the market, there is a new station at Park & 49th that has race fuel for around $6.00 ...
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Old 06-11-2011, 09:52 AM   #62
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I have no idea how a L99 or LS3 ecm control timing depending on the octane but on our LLT, 87 will defenitely pull timing vs 93 octane. Our LLT has a static CR of 11:3. On other cars with a cr of 11:3 I can almost guarantee that premium fuel is required. The reason why GM say its ok to put 87 is because the ecm will simply compensate for the lower octane safely bringing the timing down to be knock free with 87.

Higher the octane the higher the timing will advance on our LLT, but how far the timing will advance to is something I am still trying to figure out.
So far the timing advanced to 34*+!! with 105 octane and this is with -4* retard from stock. Our stock timing is anywhere from about 20-25 peak at WOT depending on the condition and gas.

Dont get me wrong tho.. more timing does not equal more HP. Not always.
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Old 06-11-2011, 10:18 AM   #63
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.....

Dont get me wrong tho.. more timing does not equal more HP. Not always.
It can't be a bad thing though, right?
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Old 06-11-2011, 10:25 AM   #64
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[QUOTE=Cbrenthus;3326901] Check out the website for ethanol free, I forget the name but you can google it. QUOTE]

Here it us ! ! :

http://pure-gas.org/
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Old 06-11-2011, 10:27 AM   #65
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