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Old 04-03-2013, 09:29 AM   #1
TheNotoriousMAZ
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Experience with Costco gasoline?

I recently caved in and got myself a Costco membership. I was going to fill up there the other day, but the line was a little long when I needed to make it to work. It's in a convenient location too, right off the highway I take everyday.

I did see that the gas was literally 20 cents cheaper than the cash price at the other two (BP & Marathon) stations on the same street. It's definitely enticing since I drive nearly 20k miles a year and fill up quite often. Is Costco gas inferior to other gas brands? I like to maintain my vehicles well, and I'd turn up the savings if it meant that my engine life would be better.


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Old 04-03-2013, 09:32 AM   #2
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We dont have Costco around here but we do have Sam's Club which is almost always 20 to 30 cents cheaper a gallon. Ive been getting gas there on and off about every 3 or 4th thank when im in the area for the last 8 years. Never has an issue with the gas and more often than not my fuel economy is the same or better than gas I get at other places. That all speculative of course but thats my results most of the time.
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Old 04-03-2013, 09:33 AM   #3
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gasoline is gasoline

here is an article

http://abcnews.go.com/GMA/Business/s...1#.UVw-W5PnCuI

costco uses "generic"
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Old 04-03-2013, 10:56 AM   #4
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I've used Costco gas before. No difference from the Sunoco, Mobile, BJ's or Stop & Shop gas. All the gas comes from the same place.
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Old 04-03-2013, 10:57 AM   #5
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I pretty much use costco gas exclusively in my cars and the work trucks. I use premium in my focus and I have never had a problem. The only difference I can see is if you like live in Oklahoma and they have some of the stations with the ethanol less gas. Normal gas is what, ten percent ethanol I think?
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Old 04-03-2013, 11:38 AM   #6
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Quote:
Originally Posted by Duffman355 View Post
I pretty much use costco gas exclusively in my cars and the work trucks. I use premium in my focus and I have never had a problem. The only difference I can see is if you like live in Oklahoma and they have some of the stations with the ethanol less gas. Normal gas is what, ten percent ethanol I think?
Have you noticed any noticeable gains from using premium? I was told that putting in the wrong octane gas will result in engine pinging. If I can get the premium at Costco for the price of regular at other gas stations, I might just do that. And yes, I think Michigan has pretty tough standards on being at least 10% ethanol.
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Old 04-03-2013, 11:53 AM   #7
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I started to exclusively use Costco gas here in Minnesota about a year ago, and there isn't a noticeable difference. I'm still able to get 34-40+ MPG on the highway on a regular basis....even on winter blend.

I've also tried the premium from normal stations as well as Costco....and it has never improved my fuel efficiency a noticeable amount. Apparently it's supposed to help with low-end torque, but I really don't notice the difference. There's endless threads on this forum regarding gas and the benefits of different kinds that you can read in to if you want.

I don't actually buy a lot of things from inside Costco...but the money I save at the pump easily pays for the membership price over a year of filling up. I drive about 25,000 miles per year.

Last edited by elchupoopacabra; 04-03-2013 at 11:56 AM. Reason: More conservative mpg :)
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Old 04-03-2013, 12:54 PM   #8
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Quote:
Originally Posted by TehMark View Post
gasoline is gasoline

here is an article

http://abcnews.go.com/GMA/Business/s...1#.UVw-W5PnCuI

costco uses "generic"
"When gasoline arrives at regional distribution centers, it's all the same. Different gas station chains then buy the raw fuel and add their own blend of detergents. In the past, there might have been more of a difference between different brands of regular unleaded, but these days the EPA requires that all gas contain a minimum amount of detergent to keep car engines clean..."

Everyone has their own opinion and if you don't really care what your car runs on; I get that. I'm not one of those people, however.
But if you're asking the question; you're not a blaise car owner and wish to elongate the service life... I went through school to learn about this crap and plied everyone of the fuel instructors for their opinions on the matter I got the same answer from all of them:

http://www.toptiergas.com/retailers.html

The list is updated frequently, and just because a brand is on the list now is no guarantee they'll be there next month. As the writer and scientist both eluded, before they said "gasoline is gasoline"; it was mentioned that there is a nationwide set of MINIMUM requirements... the retailers on this list go above the minimum to ensure deposits aren't a regular side effect of using their brand of petrol.

So it does go beyond simple brand-loyalties.
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Old 04-03-2013, 12:58 PM   #9
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I've been using Costco gas in all of our cars for 7-8 years now with no noticable issues. Regular in most of the fleet and premium in my Trans Am.

The only issue is my wallet is heavier.

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Old 04-03-2013, 01:03 PM   #10
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I'm a believer in top tier gasolines especially with the premium I run in my STI but my other two vehicles are fine on a tank of grocery store gasoline here and there if I'm too lazy or cheap to go to the local Conoco.
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