GM recomended gas
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2008-2013 Cadillac CTS General Discussion Discussion, GM recomended gas in Cadillac CTS Second Generation Forum - 2008-2013; The Cadillac owners manual suggests using only gas with a Top Tier Rating, I have been filling up at Costco ...
  1. #1
    Delly is offline Cadillac Owners Member
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    GM recomended gas

    The Cadillac owners manual suggests using only gas with a Top Tier Rating,

    I have been filling up at Costco for their lower price.

    Does anyone know who supplies gas to Costco ?

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    928S is offline Cadillac Owners Connoisseur
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    Re: GM recomended gas

    Quote Originally Posted by Delly View Post
    Does anyone know who supplies gas to Costco ?
    Sorry, no. Regardless of refiner/distributor, the gasoline sold by Costco (Sam's Club, WalMart, Kroger, and many other retailers) is NOT GM-recommended Top Tier™: http://www.toptiergas.com/retailers.html.

  4. #3
    MotownPimp's Avatar
    MotownPimp is offline Cadillac Owners Enthusiast
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    Re: GM recomended gas

    I had no idea such a list existed. Very helpful thread...particularly the list of approved suppliers.

    I knew there had to be a reason I hang out with y'all!

  5. #4
    bobelew is offline Cadillac Owners Fanatic
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    Re: GM recomended gas

    I am not sure what part of the country you live, but here in Washington state, Costco gas is now rated as "Top Tier" and has been for several months now. According to Costco their gas has one of the most robust detergent regular grade gasolines out.

  6. #5
    Delly is offline Cadillac Owners Member
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    Re: GM recomended gas

    Thanks bobelow.

    from the manual:
    Look for the TOP TIER label on the
    fuel pump to ensure gasoline meets
    enhanced detergency standards
    developed by auto companiesFrom the manual

    Do the pumps out there display the Top Tier logo,
    The pumps in Northern VA do not.

  7. #6
    somedaycts is offline Cadillac Owners Fanatic
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    Re: GM recomended gas

    GM only "recommends" using "top tier" fuel, just as you'll find the oil cap "recommends" Mobil1 oil, and the Ford Fusion gas cap "recommends" BP fuel. Interesting that Ford would "recommend" BP fuel when it's not a "top tier" gimmick. Keep using Costco gas, and keep saving money.


    Also from the manual:

    "At a minimum, gasoline should meet ASTM specification
    D 4814 in the United States or CAN/CGSB-3.5 or
    3.511 in Canada."

    "For customers who do not use TOP TIER Detergent
    Gasoline regularly, one bottle of GM Fuel System
    Treatment PLUS, added to the fuel tank at every engine
    oil change, can help clean deposits from fuel injectors
    and intake valves. GM Fuel System Treatment PLUS is
    the only gasoline additive recommended by General
    Motors.

    Also, your dealer/retailer has additives that will help
    correct and prevent most deposit-related problems."

  8. #7
    housewolf is offline Cadillac Owners Member
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    Re: GM recomended gas

    From a friend that works in the supply chain for one of the largest oil companies in the US -
    All fuel comes out of the same pipeline infrastructure that all US refineries pump into. ExxonMobil can put 30,000 bbls in the pipeline at Texas and immediately pull the same amount out on the east coast. It matters not who made the fuel because it is all made to the same spec. As long as the fuel entering the line meets the required spec... in it goes. The refineries don't even know who's fuel they are selling at what station. You could be filling up at Shell with fuel that Valero produced. They have no way of knowing either, and don't care, because it's all the same.

    What matters most is the condition of the underground storage tanks where you buy your fuel. The little bit of additive put in the product to make it brand specific at the supply depot can't possibly offset potential contaminants from poorly maintained storage tanks.

  9. #8
    928S is offline Cadillac Owners Connoisseur
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    Re: GM recomended gas

    Quote Originally Posted by somedaycts View Post
    GM only "recommends" using "top tier" fuel, just as you'll find the oil cap "recommends" Mobil1 oil...
    Just for the record. Yes, in the Owner's Manual, GM "recommends" using only Top Tier™ gasoline; but "Mobil 1" was a paid product placement on the oil filler cap, not even mentioned in the Owner's Manual.

  10. #9
    MoFex's Avatar
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    Re: GM recomended gas

    Quote Originally Posted by somedaycts View Post
    Also from the manual:

    ..... can help clean deposits from fuel injectors
    and intake valves.......
    Ye, and it clean the intake valves best in the DI engines

  11. #10
    somedaycts is offline Cadillac Owners Fanatic
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    Re: GM recomended gas

    Quote Originally Posted by MoFex View Post
    Ye, and it clean the intake valves best in the DI engines
    If so, why is Ford not one of the automakers supporting "Top Tier" gasoline? Surely their direct inject, turbocharged Ecoboost engines will suffer from not using "Top Tier" gasoline .

  12. #11
    MoFex's Avatar
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    Re: GM recomended gas

    Quote Originally Posted by somedaycts View Post
    If so, why is Ford not one of the automakers supporting "Top Tier" gasoline? Surely their direct inject, turbocharged Ecoboost engines will suffer from not using "Top Tier" gasoline .

    Because Ford is smart....

    Top Tier gasoline in a DI engine has no influence on intake valves

    Injectors - I would think that given the high pressure (1,800 psi plus) the injectors are "self-cleaning".....

  13. #12
    GMFAN is offline Cadillac Owners Fanatic
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    Re: GM recomended gas

    All the buzz about 'top tier' gasoline is highly over rated. I buy a lot of my gas at Kroger, (including for the Vette). Never a problem, car's perform very well. I do have one rule I follow, I always make sure I fill up at high volume stations. Oh yeah, I'll put in a bottle of Techron every 3rd or 4th fill up.

  14. #13
    housewolf is offline Cadillac Owners Member
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    Re: GM recomended gas

    Quote Originally Posted by GMFAN View Post
    All the buzz about 'top tier' gasoline is highly over rated. I buy a lot of my gas at Kroger, (including for the Vette). Never a problem, car's perform very well. I do have one rule I follow, I always make sure I fill up at high volume stations. Oh yeah, I'll put in a bottle of Techron every 3rd or 4th fill up.
    Correct. I have a modified ~575 hp GTO that uses the "most competitively priced" (93 octane) fuel I can find. It's five years old, runs 10.80s N/A in the 1/4 on pump gas and has never had an issue.

    As I said earlier; plain and simple. There is no difference.

  15. #14
    00blueYZF is offline Cadillac Owners Member
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    Re: GM recomended gas

    Quote Originally Posted by GMFAN View Post
    All the buzz about 'top tier' gasoline is highly over rated. I buy a lot of my gas at Kroger, (including for the Vette). Never a problem, car's perform very well. I do have one rule I follow, I always make sure I fill up at high volume stations. Oh yeah, I'll put in a bottle of Techron every 3rd or 4th fill up.
    ^ Here is the key in bold

    I'm not disagreeing that the fuels aren't similar, but GM recommends Top Tier so you don't have to add the Techron (which probably offsets the savings of buying cheaper fuel over 3 tanks)
    Why risk getting deposits at high mileage after the warranty has run out? SIDI injectors are not only expensive, they are finicky when it comes to clogging.

  16. #15
    Delly is offline Cadillac Owners Member
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    Re: GM recomended gas

    My last fillup at costco
    12.924 gal @ $3.579 = $46.25

    The Exxon closest to my house Would have been
    12.924 @ 3.699 = 47.98 a differnce of 1.73

    For $1.73 a week I guess I'l switch to, Exxon

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