What is the quality of Costco gasoline?

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costco
Will asked:


Is it consider top tier quality? My new car doesn’t seem to run as well on Costco 91 octane gas as it does on Shell or Mobil 91 octane gasoline. Who supplies Costco with the fuel?

George
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    • This entry was posted on Tuesday, March 24th, 2009 at 3:33 pm and is filed under Shopping. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

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    No Responses to “What is the quality of Costco gasoline?”

    1. koma Says:
      March 26th, 2009 at 2:48 pm

      go to top tier.com to find retailer with top tier gas

    2. David M Says:
      March 29th, 2009 at 12:42 am

      Gas is gas, octane is octane. While some major oil companies do create “special” additives, they are so dilute as to be insignificant. Costco gets its gas (like all other independent retailers) from major companies and/or independent producers that sell it to them either under contract or at the terminal where it is shipped to…Also your car’s computer will adjust itself to whatever the octane (within reason) that you put in your tank…..you could probably use 89 octane without harm…That is what I have used in my Lexus for the last 10 years……