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Author Topic: Different Gas Results in Different MPG's??? Topic is locked Back to Topics
Sportsmaster21

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Message Posted: Mar 27, 2009 12:55:22 PM

I've noticed that my MPG's have varied in my 2001 Hyundai Santa Fe based on the type of gas I've bought. I used to fill up at Speedway, which uses up to 10% ethanol, and I would average about 20-21 MPG's on the highway.

I've been filling up at Marathon lately, which does NOT use ethanol, and have averaged 24-25 MPG's on the highway. Everytime I'm on the highway I set my cruise to 65. Tires are properly inflated and everything. I don't top off either.

Has anybody else noticed a difference in MPG's based on the gas they buy?
REPLIES (newest first)
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GM
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Message Posted: Jun 1, 2010 5:42:43 PM

Please do not bump old, inactive topics. If a topic has been dead for two months or more, please do not post in it.
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ricebike
Champion Author New Jersey

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Message Posted: Jun 1, 2010 8:49:13 AM

sportsmaster, you're lucky to have the option of getting pure gas vs. tainted gas

what's the price difference per gallon for it vs mpg loss...
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gougedQC
Champion Author Montreal

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Message Posted: May 31, 2010 8:03:49 PM

to get back on track... you buy e-10 you will get worse mileage
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 30, 2010 2:54:52 AM

cummins2500 - He's now saying we are the same person? HAHAHAHA!!!!!!!! First off we live in two different states. Second we don't always have the same views on things but we do respect each others opinions and information that we supply. Where as jeepguy & cheapguy say the exact same thing they just claim to be different people.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 29, 2010 1:42:52 AM

cummins2500 - He won't because he thinks he has us fooled. But after reading a couple of his posts on my thread I knew they were one and the same so both are on my ignore list.
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Cummins2500
Champion Author Iowa

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Message Posted: Mar 28, 2010 11:06:21 AM

JeepGuy246 why not admit your cheapguy135?
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airduct
Champion Author Florida

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Message Posted: Mar 27, 2010 8:10:48 AM

PB->As far as the acetone goes. If you look at the ratios between th additive packages from the brands and the base gas & ethanol your only talkingabout a couple of ounces per gallon as well but those are suposed to do wonders when it comes to keeping the fuel system clean.

The additive packages used by the various brands are engineered to be in that low quantity. Fingernail polish remover, acetone, was not. Try again.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 27, 2010 2:31:11 AM

airduct - You can doubt it all you want but when I change brands I let my tank get down to the point that the low fuel ligh comes on. That comeson when there is about a gallon left in the tank. I know this fist off becaue that is what it says in the owners manual. Second when I fill up with the low fuel light on it takes between 23.5 - 24 gallons to fill the tank. This truck only has a 25 gallon tank in it. Plus when I can go from one brand that got me 17.4 ave mpg of 4 tanks with one brand and the next 4 tanks of another brand doing the same kind of driving and have the same type of weather conditions gets me 18.4 mpg on ave. That tells me that there is a difference at least for wht I'm driving between brands.

As far as the acetone goes. If you look at the ratios between th additive packages from the brands and the base gas & ethanol your only talkingabout a couple of ounces per gallon as well but those are suposed to do wonders when it comes to keeping the fuel system clean. So yor talking th same idea. Plus I said it helped me get the mileage in my old truck back to what it was before we got ethanol blended gas an hat is it. How it did it I don't know. All I know is what I saw in my mileage.
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airduct
Champion Author Florida

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Message Posted: Mar 26, 2010 9:47:38 AM

PB-> Yes the first tank may have a gallon or so of the last brand mixed in there but by the 2nd & 3rd tank it should be all the brand i'm testing.

You make the claim that an oz or so of fingernail polish remover makes a difference in your gas mileage. Don't you think that extra "few" gallons of foreign gas you have in your tank would not do the same and make your testing data flawed... How can a few oz of fingernail polish remover be so beneficial and a few gallons of gas not matter?

[Edited by: airduct at 3/26/2010 9:48:48 AM EST]
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airduct
Champion Author Florida

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Message Posted: Mar 26, 2010 9:29:41 AM

PB->>As far as the mixing of different brands goes in my gas tank. When I change brands I let my tank get as low as possible to minnimize tat as much as possible.

I seriously doubt you let your tank get down so low that you have only a gallon left.

[Edited by: airduct at 3/26/2010 9:34:55 AM EST]
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 26, 2010 2:18:55 AM

airduct - That is true the base gas could be coming from one of three terminals in this area with the only exception being Irving that comes from their own terminal only. That is why I also go to multiple stations of the same brand while doing the test so I can be sure to have gotten gas that has the base gas from more than one terminal.But as I've said before the only differences should be the additive packages & ethanol level.

As far as the mixing of different brands goes in my gas tank. When I change brands I let my tank get as low as possible to minnimize tat as much as possible. Yes the first tank may have a gallon or so of the last brand mixed in there but by the 2nd & 3rd tank it should be all the brand i'm testing.
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cheapguy135
Champion Author New Jersey

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Message Posted: Mar 25, 2010 9:05:28 AM

airduct...."That is true true. The gas you get in your 4 tank fulls is in the same thought. Its about the same, but not. First you have some gas from previous fills still in the tank and you have no idea what you are pumping. You do not know the origin of the gas..... For all you know most of the different brands could have very well come from the same source and the additive package is the only difference."

Excellent point. What's left over in his tank after each tank's "test" and any alledged differences between that and the next tank/brand has a far greater difference and bearing on his imaginary result than the alledged difference between brands/additives and their corresponding dilution ratios. In his own words, "Yes all gas is about the same but it's not exactly the same." The residual gas in his tank makes the subject of his test about the same, but not exactly the same. So by his own admission, his tests are useless (as usual).
He's still measuring the immeasurable and of course he'll choose to ignore any post that disproves his "theories", so I don't expect a response.
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OilerFan
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Message Posted: Mar 25, 2010 8:53:31 AM

You will definitely notice better mileage in non-ethanol gasoline.
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airduct
Champion Author Florida

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Message Posted: Mar 25, 2010 8:41:24 AM

PB->Yes all gas is about the same but it's not exactly the same.

That is true true. The gas you get in your 4 tank fulls is in the same thought. Its about the same, but not. First you have some gas from previous fills still in the tank and you have no idea what you are pumping. You do not know the origin of the gas..... For all you know most of the different brands could have very well come from the same source and the additive package is the only difference.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 25, 2010 3:28:27 AM

airduct - The key word in your last post is the word about. Yes all gas is about the same but it's not exactly the same. There is a big difference between about and exactly. You can say you won't get any different fuel economy out any peticular brand. But the automobiles I've owned over my 22+ years driving have proven to me that that isn't the case with the exception of two. Also for each one it has been a different brand that was the best performing brand. You can say i'm wrong I personally don't care but I've been driving and figuring mileage out long enough to know what my automobiles get fo fuel economy and what brands have been the most consistant in delivering the better mileage.
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airduct
Champion Author Florida

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Message Posted: Mar 24, 2010 9:11:05 AM

PB ...... You cannot compare gas brands under any condition because basically all gas in about the same and none will give you any better gas mileage.

[Edited by: airduct at 3/24/2010 9:11:53 AM EST]
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 24, 2010 3:17:10 AM

airduct - you know what I ment if you have some brands driven under one condition and some under another your not going to have an accurate comparison.
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Sportsmaster21
Champion Author West Virginia

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Message Posted: Mar 23, 2010 2:23:28 PM

Quick68,

At the time, the Marathon station did not have an ethanol blend. That, however, was short lived. I can't find a station anywhere around that doesn't have ethanol in it now.
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airduct
Champion Author Florida

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Message Posted: Mar 23, 2010 9:30:15 AM

>>You should all know the formula by heart by now.

Now I got it. Clear as mud!!!!!!!!!


[Edited by: airduct at 3/23/2010 9:32:15 AM EST]
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cheapguy135
Champion Author New Jersey

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Message Posted: Mar 23, 2010 9:22:20 AM

airduct to PB...."What is a "condition" in some gas brands?"



A "condition" would be what PB bases his "factoring" and "adjustments" on for various regions and variables including those in your "normal" driving area while conducting his "tests/research", along with winter/summer blends, normal/extreme weather conditions, nail polish remover/non-nail polish remover spiked gasoline, Canadian imports/domestic finished product, pre MTBE/post-MTBE/post-MTBE laced with nail polish remover, 4 tanks winter blend (1 under extreme conditions)/ 4 tanks summer blend (1 tank long trip mileage) while allowing for rounding errors to the nearest 1/1000 of a penny, extrapolating, guesstimating, and filling in any blanks he needs in order to get his data and conclusions to fit his pre-conceived notions about brands/CPM/ and ethanol. You should all know the formula by heart by now.

After all, "it's the only way to truely find what brand is the cheapest to run in your normal driving area".


NOT!!!! BAHAHAHAHAHAHA!!!!
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airduct
Champion Author Florida

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Message Posted: Mar 23, 2010 8:42:52 AM

PB ..... your rant made no sense what so ever.

> If you have some brands with those conditions in them and some that don't your not going to have an accurate comparison.

What is a "condition" in some gas brands?
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chemist74
Champion Author Cleveland

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Message Posted: Mar 23, 2010 8:14:45 AM

Most cars will get slightly lower MPG with ethanol containing gasoline.

When you buy gasoline at a "brand" station, the additive package in the gas is that brand but the base gasoline could usually come from any refinery belonging to any oil company. The terminal that provides the fuel to the station takes what ever base gasoline is in the pipeline at the moment and adds the additive package for the specific brand.

The additives are the only thing that makes a real difference and that is mainly from the additives ability to clean up deposits on the injectors and valves.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 23, 2010 4:54:15 AM

airduct - If you have some brands with those conditions in them and some that don't your not going to have an accurate comparison. If brand A has 3 tanks under normal conditions & 1 under heavy snow and brand B has all 4 tanks under normal conditions the comparison isn't oing to be accurate. It's going to come out that brand B was better because you artificially lowered brand A's mpg with 1 tank under heavy snow.

Or something like this
Brand A tanks 4 tanks are 17.9, 18.1, 17.8, 16.2 (heavy snow)= 17.5 mpg ave.brand B tanks 4 tanks are 17.9, 18.2, 18.1, 17.8 = 18 mpg ave all under normal conditions but replace that last tank and have one under heavy snow at say 16.4 mpg would make it 17.65 mpg ave. Also would make it a much more accurate comparison because with one brand having the heavy snow tank in there your artificially lowering that brand's ave mpg. You would do the same with summer blend if you had one brand that had a long distance trip in it and the other's didn't just you'd be artificially raising the mileage of that one brand. It's not that hard to figure out.

[Edited by: pinbuster2005 at 3/23/2010 4:58:03 AM EST]
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ricebike
Champion Author New Jersey

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Message Posted: Mar 20, 2010 12:38:46 PM

that's a no-brainer OP...

ethanol has less energy

so full gas will always yeild more mpg than ethanol blended gas
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Conan1
Champion Author Kentucky

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Message Posted: Mar 19, 2010 8:11:28 PM

I don't see much difference.
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ragnarkar
Rookie Author Orange County

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Message Posted: Mar 19, 2010 4:32:30 PM

I've tried almost every national brand of gas in my town plus a few off-brands.. for me, the only brand that has ever shown consistently higher average MPGs is Chevron. I get roughly the same MPG with Shell, 76, Arco, etc.
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airduct
Champion Author Florida

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Message Posted: Mar 19, 2010 8:57:11 AM

PB->The only things I have to factor in is heavy snow/ice in the winter or long distance trips in the summer.

LOL.

> If you don't have tanks with those elements that will raise or lower your mileage in every brand your not going to be able to do an accurate comparison.

Your testing is not accurate for those very reasons. You haven't learned much in those 22 long years.

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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 19, 2010 3:58:11 AM

airduct - I never said I was doing a scientific test nor did I ever say my tests were perfect as you seem to think I have. I have always said that my results are indeed just my results and if anyone wants to know if they what they will get they need to do their own test. Most of my ststements are made from things I've observed over 22 years of driving in this area and from mechanics that have been in bussiness for many years also from tanker drivers that I've known for many years. At least I'm willing to show what I get with different brands of gas and as I've told you before my driving is consistant. The only things I have to factor in is heavy snow/ice in the winter or long distance trips in the summer. If you don't have tanks with those elements that will raise or lower your mileage in every brand your not going to be able to do an accurate comparison.
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airduct
Champion Author Florida

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Message Posted: Mar 18, 2010 8:47:16 AM

PB->The problem with you is that if someone doesn't agree with you you atomaticly think they are wrong no matter what they give you for data or anything else.

I did not say you were wrong just that you have not proven your point with the flawed data you provide. You are not a scientists even tho you make it out you are doing a scientific test. You also make many statements from second and third party information sources, none substantiated.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Mar 18, 2010 2:34:10 AM

airduct - The problem with you is that if someone doesn't agree with you you atomaticly think they are wrong no matter what they give you for data or anything else. You are one of those people that THINK all gas is the same. Well it isn't. Ethanol content, additive packages, even maintenence on the pumps at the stations can make one brand different from the other. I have said this in the past some automobiles get the same mileage no matter what you run in them while other automobiles do get better mileage more consistantly with certain brands. Even my father who has owned as many if not more automobiles than you in 50+ years of driving has said the same thing.

It has nothing to do with advertising hype. I've been in the retail industry long enough not to get fooled by advertising hype. Plus there are no big ad campains for Irving gas or Getty/Lukoil the two brands that have done the best in my 2000 & 20001 f-150s. So if it was advertising hype I'd be saying BP or Shell did the best because they are the only brands running any kind of ad campains on TV about how great their additives are. In fact Shell and BP are near the bottom as far as average fuel economy and cost per mile.
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airduct
Champion Author Florida

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Message Posted: Mar 17, 2010 5:39:36 PM

I am sure some think they get better gas mileage just because they pay a higher price for gas. Neither octane or brand will make an iota of difference.... LOL
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cheap1gas
Rookie Author Ontario

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Message Posted: Mar 17, 2010 4:04:27 PM

Well i drive a 98 corolla and tried different types of gas but never noticed any difference in gas millage.I always fill it up and reset my kilometers and almost always average about 550 km per tank. so no difference to me.
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mac07928
Sophomore Author New Jersey

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Message Posted: Mar 16, 2010 10:57:18 AM

Slightly higher MPG when I fill with 92 or 93 octane gas but don't know yet if the math works on price per mile. Will try to figure that out with more recording of prices and mileage.
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Quick68
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Message Posted: Mar 16, 2010 1:22:02 AM

All the Marathon stations I know uses 10% ethanol.
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hibsaw
Champion Author Mississippi

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Message Posted: Jan 3, 2010 6:47:18 PM

There is one station that has ethanol free gas in my hometown.I get an extra 40 miles per tank when I use ethanol free gas.
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stoihor
All-Star Author San Bernardino

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Message Posted: Jan 3, 2010 3:39:49 PM

I am usually getting better MPG when using Shell.
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americanmade1
Champion Author Tampa

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Message Posted: Jan 3, 2010 2:07:29 PM

I fill up at Racetrac cause it's the cheapest around and I get get 30.5mpg....
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the1roadhog
Champion Author Atlanta

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Message Posted: Jan 3, 2010 8:03:16 AM

Negligible
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n9vpm
Rookie Author Indiana

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Message Posted: Jan 3, 2010 5:55:46 AM

NOT
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airduct
Champion Author Florida

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Message Posted: Jan 2, 2010 11:55:21 AM

So far I have not noticed a drop in gas mileage on either of our vehicles using 10% ethanol or less (pump sticker) around where we live or when traveling..... I don't buy gas brand specific and use what is available when I need gas.

We took a 10K+ mile road trip to the Pacific NW and down to CA this past summer in our 02 Ford van W/V10 and all the gas we used was 10% ethanol or less according to the stickers on the pump. In fact we noticed a very slight increase in MPG when comparing this trip with like trips we took in the past to the same area of the country using the same vehicle before ethanol was the norm....

[Edited by: airduct at 1/2/2010 11:58:00 AM EST]
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sluggopyle
Champion Author North Carolina

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Message Posted: Jan 2, 2010 11:42:27 AM

Mikerock-- E10 *IS* different gas. That makes all the difference.

Sportmaster's drop between the two fuel supplies looks like around 20%. Comparing E10 and E0 over the last couple of years, I get the same results exactly. So I think his original conclusion is sound.
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airduct
Champion Author Florida

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Message Posted: Dec 30, 2009 8:56:53 PM

pb.... As i've stated before basicly the same and exactly the same are not the same.

Then using that thought you are never right in what you post.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Dec 30, 2009 6:17:30 PM

airduct -"No doubt the placebo effect on the part of the driver brought on by the hype of the moment or advertising. "

There is no plecebo effect when checking my mileage it's all miles driven and gallons used. Plus I don't know about where you are but around here there are no big advertising campains for gas brands or any other "hype" again it's all just miles driven and gallons used.

"You fail to under stand that all gas is basically the same regionally with an additive package that is placed in the gas shortly before it is delivered to the station. Even if those additive packages carry cute and different names they are similar and do the same job."

As i've stated before basicly the same and exactly the same are not the same. Could some brands additive packages do a little better job than others in cleaning the fuel system? Nobody can prove it one way or another.

"We all are more consistent than the "average driver" in our own eyes. The truth is we all are different and drive differently. Does that make us all average?"

When I say I drive more consistantly than the average driver I'm talking about my highway/city driving ratio is the same every week. I also drive the same roads all the time.
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gougedQC
Champion Author Montreal

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Message Posted: Dec 30, 2009 10:49:17 AM

pumps are not labelled here, but have noticed a wide variation in mileage on the same long distance trip. I can only presume that in some cases Im getting more ethanol which gives lower mileage than at other times.
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airduct
Champion Author Florida

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Message Posted: Dec 30, 2009 8:58:12 AM

PB .....>The thing is that it's not the same brand for everyone and you fail to understand that.

You fail to under stand that all gas is basically the same regionally with an additive package that is placed in the gas shortly before it is delivered to the station. Even if those additive packages carry cute and different names they are similar and do the same job.

>>For what ever reason some automobiles do get better mileage with certain brands of gas and some get the same no matter what brand gets dumped in them.

No doubt the placebo effect on the part of the driver brought on by the hype of the moment or advertising. Or do you know something no one else knows and can prove yourself right. Just saying so does is in no way constitute proof. I use gas just as you do and in all the vehicles I have ever owned and I dare say I have owned more than you, all have given the same MPG with any gas I have placed in ye olde tank.

>The reason for that is that I drive very consistantly probly more consistantly than the average driver.

We all are more consistent than the "average driver" in our own eyes. The truth is we all are different and drive differently. Does that make us all average?

[Edited by: airduct at 12/30/2009 8:59:22 AM EST]
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Dec 30, 2009 2:41:07 AM

airduct - "If one brand of gas was able to deliver and show proof of that extra gas mileage you so state you get it would be world wide news. I am sure it would have made front page news in all the papers of the world as well...... None of this has happened. Don't you consider that a little odd? "

The thing is that it's not the same brand for everyone and you fail to understand that. It's never been the same brand for every automobile that I have owned. For what ever reason some automobiles do get better mileage with certain brands of gas and some get the same no matter what brand gets dumped in them. I can go thru all the automobiles that I've owned and none of them got their most consistant mileage out of the same brand. Just going thru the last three I've owned they weren't the same. My 1995 Ranger pick-up did the best with Merit a local brand that was bought out by Hess & Gulf. My 1999 Ranger pick-up did the best with Exxon & Citgo. My 2001 F-150 did the best with Getty/Lukoil & Hess. The F-150 was Texaco & Getty before the texaco stations changed to Shell.

"No need to, you do that to yourself when you post. You try to make your testing out to be scientific and under controlled conditions when all it is is a persons testimonial of the gas mileage they are getting. You fail to take into consideration that your gas mileage will always vary from tank to tank no matter the brand of gas used......"

To a point I agree your mileage will vary tank to tank but under normal conditions it shouldn't very that much. Mine normally goes .5 mpg one side or the other from the average for that time of year. The reason for that is that I drive very consistantly probly more consistantly than the average driver. Granted I can't control the weather but everything else that I can control I do and some brands are more consistant in mileage than other. I have never said my tests were perfect I said that they are my results and only my results. But what I try to show is that there could be a difference in mileage between brands and that just going to the cheapest station isn't always going to be the cheapest to run.
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Cummins2500
Champion Author Iowa

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Message Posted: Dec 29, 2009 7:35:41 PM

is this right?

87 oct Regular gas
89 oct Super unleaded (Ethanol)
91 oct Preim

Yes it is correct. BTW some places call the 89 octane gas Mid Grade and some call it Unleaded Plus.
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LQQKin4Gas
Rookie Author Omaha

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Message Posted: Dec 29, 2009 4:58:26 PM

to your question ...i always use 87 octane , for 1 i think useing 89 w/ethanol is maybe good on older cars i drive a 2000 mini van. i to buy my gas from 2 different ggas stations and sometimes wonder is the gas is better at one. but i think it plays a big part in where you live and drive most if i go onto the highway and drive thru the hills and since its almost windy here every day the mpg will go up and down i havea 27gal tank and get around 513 miles to a tank on a good day...weather and road conditions play a big part in mpg..
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LQQKin4Gas
Rookie Author Omaha

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Message Posted: Dec 29, 2009 4:47:09 PM

is this right?

87 oct Regular gas
89 oct Super unleaded (Ethanol)
91 oct Preim

any one help me on this i drove to a gas station i saw it said regular gas 2.37.9 but when i got there it was super unleaded w/ethanol so before i start adding new prices i need to know for sure what the octane grades are.. Thnku
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cheapguy135
Champion Author New Jersey

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Message Posted: Dec 29, 2009 3:44:07 PM

Sounds like PB pretending to know what he's talking about again. Still clueless after all these years and trying to make the entire petroleum industry fit his "research" intead of vice-versa. Wonderful.
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