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Thread: Costco Gas

  1. #1
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    Default Costco Gas

    I been hesitant to purchase Costco Gas because I kept on thinking its like Arco Gas. Anyone purchased Costco Gas? Comparable to Shell or Chervon?

    Thanks

  2. #2
    Flashaholic* BIGIRON's Avatar
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    Default Re: Costco Gas

    If you're talking about gasoline, it may come from the same distributor.

  3. #3
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    Default Re: Costco Gas

    I buy BJs gas, no problems yet.
    I live in a van down by the river

  4. #4

    Default Re: Costco Gas

    Quote Originally Posted by dealgrabber2002 View Post
    I been hesitant to purchase Costco Gas because I kept on thinking its like Arco Gas. Anyone purchased Costco Gas? Comparable to Shell or Chervon?

    Thanks
    I fuel almost exclusively at Costco (NY), and the car ('98 Camry) runs fine.

  5. #5
    Flashaholic* greenlight's Avatar
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    Default Re: Costco Gas

    If you use your costco card you get a discount.

    BTW, what's wrong with arco gas? That's what we have most of out here.

  6. #6
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    Default Re: Costco Gas

    Quote Originally Posted by dealgrabber2002 View Post
    I been hesitant to purchase Costco Gas because I kept on thinking its like Arco Gas. Anyone purchased Costco Gas? Comparable to Shell or Chervon?

    Thanks

    FWIW, BP owns ARCO.
    Keep it simple.

  7. #7
    Flashaholic* shakeylegs's Avatar
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    Default Re: Costco Gas

    These are the refineries we have in the San Francisco Bay Area:

    Chevron U.S.A. Inc., Richmond Refinery
    Tesoro Refining & Marketing Company, Golden Eagle (Avon/Rodeo) Refinery
    Shell Oil Products US, Martinez Refinery
    Valero Benicia Refinery
    ConocoPhillips, Rodeo San Francisco Refinery

    They supply all norcal stations with gasoline, whether brand name or independent. I once got a tank full of *%*&&*%&(^ from a nationally known chain. Never had a problem with Costco, Rotten Robbie, or any other independent dealer. Gas is probably gas unless it's contaminated somehow at the station you just visited. Unless I'm driving the lunar lander, I'm pulling into the place with the best price. IIRC, federal law mandates that all cars must be able to run on regular grade gasoline. So there must be some basic formula or standard adhered to (california reformulated aside).

  8. #8
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    Default Re: Costco Gas

    I always buy gas from CostCo. Never a problem.
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  9. #9
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    Default Re: Costco Gas

    I only puchased gas from ARCO once. It made my car slow on accerlation and I didn't quite give me the mileage that Shell, 76, and Chervon did. I use mainly 89 (super??). That was the last time I went to ARCO. That's my experience with ARCO. I hope Costco Gasoline is not like ARCO.

  10. #10
    Flashaholic* shakeylegs's Avatar
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    Default Re: Costco Gas

    Are you driving something with a super high compression engine?

  11. #11
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    Default Re: Costco Gas

    Quote Originally Posted by dealgrabber2002 View Post
    I only puchased gas from ARCO once. It made my car slow on accerlation and I didn't quite give me the mileage that Shell, 76, and Chervon did. I use mainly 89 (super??). That was the last time I went to ARCO. That's my experience with ARCO. I hope Costco Gasoline is not like ARCO.
    I'm curious, how were you able to measure the slower acceleration.

    Many times I'm unable to tell variances in acceleration. Were you using a timer / distance measuring device?
    Mini split rings for attaching lanyard trick. D10 DIY diffuser trick.

  12. #12
    *Flashaholic* greenLED's Avatar
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    Default Re: Costco Gas

    Quote Originally Posted by dealgrabber2002 View Post
    I only puchased gas from ARCO once.
    I purchase gas only at Arco stations - never a problem.

  13. #13
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    Default Re: Costco Gas

    Assuming the car is OK (injectors, fuel filter, O2 sensor, tank pickup, etc. are all good) there are very few problems with most brand name gasolines over any of the other brands. Number one rule is to not fill up while the station tanks are being filled or shortly thereafter. Other than that, as long as all the locally available brands have switched from Winter blends to Summer blends, it probably wouldn't matter.

    Using higher octane on a regular basis also probably isn't necessary unless you have a high performance engine. Modern fuel systems with knock sensors will take care of most differences with regards to octane levels. Check the manual.
    "Show them a light, and they'll follow it anywhere..."

  14. #14
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    Default Re: Costco Gas

    I have a hard time believing that gas between major sellers is any different, but whatever.....

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    Default Re: Costco Gas

    Nothing but Costco gas here, 5% back on every purchase, no problems at all.

    The only difference between major franchises is the additives they use from what I have heard.
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  16. #16
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    Default Re: Costco Gas

    So far, my mother has been using Costco gasoline without any problem. I mostly use Arco myself and sometimes Valero since they have the lower prices in my area. My dad prefers Mobile.

    My mother also used to use Arco but then started using Mobile after a co-worker told her that Arco mixes water with their gasoline She then started using Mobile along with my dad and both always put Premium fuel in their cars since my dad also though higher octane gas meant it gives better performance (more "burning power" he says) and has more additives to help keep fuel injectors and internal engine parts clean.

    But then after the price of gas went past $2.00 back in 2001, my mom switched to regular unleaded without trouble and later started using Costco fuel since she had a membership there and it was also convenient to buy groceries for the week and get fuel at the same time.

    Dad still puts Premium fuel in the car he drives.

  17. #17
    Flashaholic* Trashman's Avatar
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    Default Re: Costco Gas

    My uncle once told me that he had a friend that was "in the industry" who told him that it's all the same stuff, regardless of where you buy it.

  18. #18
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    Default Re: Costco Gas

    I have read a few studies on this and the results seem to indicate that there are some differences in gasoline.

    It seems that octane is determined by different tests. The Research method yields higher octane values, but the Motor method translates to better performance in your car. The octane at the pump is an average of the two.

    I believe the Research method of determining octane came first, but differences in performance were observed with gas having the same octane, so the Motor method was devised. The Motor method involves higher RPM and higher intake air temperatures.

    Gas with a higher Motor octane value seem to perform better, but I also think they are a little more expensive to formulate. At any rate, both numbers are moving targets, so it is subject to how the gas is formulated at the refinery.

    If gas from all the refineries is pumped into the same storage tanks prior to distribution, then there would be little difference between them.

    There is a difference in additive packages between the different brands. As I understand it, the additive package is put into the tanker truck before the gas is loaded. Traveling to the station mixes the additives into the gas and that becomes the brand of gas. Cheaper gas has less of a complete additive package.

    In talking with various mechanics that work on engines, they seem to notice that cars that regularly run on "cheap" gas seem to have more deposits in the engine, and have dirtier injectors. Unfortunately, they don't spend time documenting this, and we have to keep in mind that they are working on "problem" engines and we don't know what initially caused the problem to start.

    It may be an idea to add a little gas additive if you run "cheap" gas all the time, but choosing which additive is a more daunting task than picking a brand of gas. Perhaps a better idea is just to put a tank of "better" gas in every once in a while.

    I had one mechanic give high praise to Techtron in one breath, then swear at it in the next breath when one of his customers put a gallon of it in a 12 gallon tank and then brought his car back saying that it was running a little "strange..."

    I have also heard that Costco buys gas on the "spot market" and is not locked into any one brand. However, I am sure this is subject to change, depending on what they can negotiate.

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  19. #19

    Default Re: Costco Gas

    Costco gas worked just fine the one time I used it.

    I won't use it again though. Waiting in line for 20 minutes to save five bucks is ridiculous.

    Got Biodiesel?

  20. #20
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    Default Re: Costco Gas

    Quote Originally Posted by Diesel_Bomber View Post
    Costco gas worked just fine the one time I used it.

    I won't use it again though. Waiting in line for 20 minutes to save five bucks is ridiculous.

    Go after 8 pm
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  21. #21
    Flashaholic* Wattnot's Avatar
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    Default Re: Costco Gas

    If I hadn't lived in Phoenix for a few years, and used Arco water myself, I too would doubt there could be anything wrong with it. However, I wouldn't write off someone complaining about poor performance with Arco "gas."

    Displacing night on a daily basis.

  22. #22
    Flashaholic* BigHonu's Avatar
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    Default Re: Costco Gas

    I believe the base formula is the same, and shared the different companies. The additive packages however is what sets Shell apart from Chevron, etc.

    Filling up at different stations with perceptible differences in performance is not out of the ordinary. For instance, on a high compression or forced inductgion engine, you need a high octane gas. Filling up with 91 'Premium' at some other place vs. the 93 octane 'Premium' at your regular place can get your car's computer to pull a few degrees here and there.

    Also, take into account the location and time of year you filled up gas. Colder regions may have the 'winter' stock around for a little longer which has been known to be a hit on performace.

    BTW, we almost exclusively use COSTCO gas here as it is usually the cheapest.

  23. #23
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    Default Re: Costco Gas

    I have no problems with Costco gas.
    There is a difference in gasoline, because I had a 1983 Toyota Corolla that the engine would die out every morning at the first stop light going to work using Chevron, then I switched to Mobil and the problem went away. Switched back to Chevron and the problem came back. After that I stay with Mobil as much as possible.

  24. #24
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    Default Re: Costco Gas

    Is gas pumps at Costco a relatively new thing? The two Costco's I regularly visit have never had gas.
    I live in a van down by the river

  25. #25
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    Default Re: Costco Gas

    Quote Originally Posted by geepondy View Post
    Is gas pumps at Costco a relatively new thing? The two Costco's I regularly visit have never had gas.
    Depends on the store and if the city allows them to install the pumps.

    My Oxnard store has them but the Goleta store, the city wouldn't let them install the pumps.

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