Brand of Gas matter for our Cadillacs?
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2008-2013 Cadillac CTS General Discussion Discussion, Brand of Gas matter for our Cadillacs? in Cadillac CTS Second Generation Forum - 2008-2013; I know that there has been numerous studies done on this on the net and it seems everyone wants to ...
  1. #1
    azianbob is offline Cadillac Owners Member
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    Brand of Gas matter for our Cadillacs?

    I know that there has been numerous studies done on this on the net and it seems everyone wants to agree to disagree. So I thought I would reach out to the Caddy Community and ask the long time owners what experiences they have gone through.

    I am aware that octane level does not matter, if your Caddy was designed for 87 gas, just put in 87 gas, it won't affect performance or your engine's life. If you have a V and need premium, then you better put it in.

    However, does brand of gas (and namely their detergent additives) really make a difference long term?

    I am asking because here in southern California, gas prices are pretty outrageous to start out with. There is a pretty big difference between an off-brand and one of those so called "Top Tier" brands.

    For instance, right now, United Oil gas is $3.43 a gallon for regular. The cheapest top tier gas in the area is 3.59, but most are in the 3.69-3.79 range for regular.

    It seems the off brand gas like Costco, United Oil, and ARCO (which I never use because they don't accept credit cards is annoying, plus I always get worse gas mileage with them) are 10-20 cents cheaper on average than Chevron, Shell, Mobil and 76.

    Has anyone used the off brands for a long time, and have they caused any bad side effects? Like cat converter or injector issues? Any other engine issues? I've read that all gas comes from the same refineries, the only difference between the brands is the detergent additives, which only make up like one millionth of the fluid anyways.

    20 cents a gallon is about a $150-$200 difference a year for me. Another option is to use the cheap brands and buy a bottle of Techron for $10 once a year and dump it in.

    Any thoughts? Thanks so much!

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  3. #2
    dreiloft's Avatar
    dreiloft is offline Cadillac Owners Fanatic
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    I have owned three new Caddy's since 2010, I have used all brands of gasoline (that are available on the east coast) with no problems and with no fluctuation in gas mileage.

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    MoistCabbage's Avatar
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    Gasoline brand makes no difference, in any vehicle, in any way.

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    Joe
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    Re: Brand of Gas matter for our Cadillacs?

    Buy the cheapest gas, don't waste your money.

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    Citabria's Avatar
    Citabria is offline Cadillac Owners Member
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    I was using less expensive gas and would always have a bunch of black carbon on my tailpipe tips. Mentioned it to my service department when getting an oil change and the advisor said it was the cheap gas. Switched to top tier gas and after several tanks much, much less unsightly carbon.
    bluefleetwood likes this.

  7. #6
    BlueAngel#07's Avatar
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    Mine likes 93 octane, it tends to hesitate when taking off when I use off brand, but maybe I need my throttle body cleaned. I agree that it burns cleaner. In my opinion.

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    bluefleetwood's Avatar
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    Re: Brand of Gas matter for our Cadillacs?

    I have a lot of gray hair of whats left meaning I have lots of time and years to experiment.
    All gas is NOT the same. You get what you pay for.
    Over the years I have found that Amoco, now BP burns the cleanest. Leaving very little build up. My wife was using BP in her 2005 Lexus since new. At about 75,000 miles she pulled into a Shell station cause her tank was near empty and noticed more power off the line. For my wife to notice it was pretty amazing in itself. 30,000 miles later......check engine light. Massive carbon build up on the intake. $1600 Throttle Body Work. No need to say she's back on BP. "Shell, you can keep your Nitrogen" Her Lexus currently has 176,000 miles worry free. One question, if all Gas is the same, and Shell claims they add Nitrogen, then is Coscto adding Nitrogen too? Hmmm, I wonder?
    BP in all my cars, 3 Caddys, 1 GMC, 1 Miata, 2 Lexi, 1 LaCrosse. Have yet to have a fuel related issue since. Other then the occasional dead pump which is not brand related. The GMC Jimmy and the Miata. I sold an 88 Bonneville SSE that I bought new to buy my 09 CTS. The Bonneville left here with 236,000 miles on it with the original Fuel Injectors in place. Changed a couple of pumps and the Mass Air Flow Sensor once.
    You may occasionally see cars, especially white ones, with all kinds of black crap on their rear bumpers particularly near the exhaust. Car is usually in pretty poor condition as well. Obviously the owner is gasing up where ever.
    I have lots more examples for those who want them. Spend the few pennies more per gallon. It may save you heart ache later. Remember "You are what you eat".
    Oh, and don't forget those Oil Changes...............thats another thread.
    My $0.02.

  9. #8
    MoistCabbage's Avatar
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    The comments on additives and carbon on the tailpipe.....

    Do a search on Top Tier gas. It contains more detergents than required by the EPA, and in some areas of the country it's hard to find a gas station that ISN'T top tier. So the gas from that no name station on the corner could very well be just as "good" as the Mobile stations gas down the street.

    Arvin is a byproduct of burning gasoline, nothing to worry about.

    I wonder what brand of gas GM uses during drivetrain development and new vehicle testing.....

  10. #9
    The_Judge's Avatar
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    Re: Brand of Gas matter for our Cadillacs?

    The gas you buy from United or any other "off brand" comes from the same few refineries that make the so-called Top Tier brands. All have a healthy dose of detergents. Indeed, what your United station sells is probably excess inventory that was made for one of the majors.

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    Joe
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    Re: Brand of Gas matter for our Cadillacs?

    Sorry I don't buy it Bluefleet. I'm 65 and have driven so many vehicles over the years I wont bore you with the list. I always used the cheapest gas and ran numerous vehicles over 200K and never had to change an injector. I definitely have black soot on my tailpipes but that's not from cheap gas; probably because I have a lead foot. I'm open for more argument from some reliable source; any fuel specialist out there? I will be the first one to say I'm wrong. Years ago in the 50's and 60's it did make a difference where one bought gas. Gas stations had poor storage and were not held accountable. I remember burning Amoco white gas in my 69 Chevelle because it burned cleaner and was lead free.
    Happy Motoring!

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    Re: Brand of Gas matter for our Cadillacs?

    Joe reminds me of one piece of excellent advice -- NEVER buy gas from crappy old stations with ancient tanks that are full rust, dirt, and water.

  13. #12
    MoistCabbage's Avatar
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    Usually not a problem unless you find some ancient station in the boonies.

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    azianbob is offline Cadillac Owners Member
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    Re: Brand of Gas matter for our Cadillacs?

    Thanks for all the replies so far. I really like my Cadillac so far ... But I don't really accelerate that fast (too much gas ... Only do it if I'm late or merging) but I go kind of fast for my top speed on the freeway (70-80 mph).

    I did notice that there is a lot of black soot in my exhaust pipe ... I cleaned it. I guess I'll try to use top tier gas and see if that makes any difference. If there is still buildup after a couple months then probably not gas brand related. My previous car was a Nissan altima ... it never had the black buildup on the exhaust and I used top tier 90% of time.

    I also heard that you want to fill up in a station with a lot of customers so you always get the new gas with less contamination. Also I heard that you should never fill up when the truck is dropping off gas at the station because it stirs up all the debris ... better to let it settle down to the bottom before pumping.

    I want to keep my caddy until it dies (hopefully more than 8 years) so I want to try to take as good care of it (within reason im no millionaire unfortunately) so asking for input from the community.

    Thanks!

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    C&C
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    Re: Brand of Gas matter for our Cadillacs?

    Direct Injection engines are prone to more soot (nature of the beast). There was a link (I'll try to find) stating such.

    Found one: (I believer there are others out there) http://bilalzuberi.com/2007/01/14/so...n-gdi-engines/

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    Re: Brand of Gas matter for our Cadillacs?

    Quote Originally Posted by C&C View Post
    Direct Injection engines are prone to more soot (nature of the beast). There was a link (I'll try to find) stating such.

    Found one: (I believer there are others out there) http://bilalzuberi.com/2007/01/14/so...n-gdi-engines/
    I agree, I am also concerned about that buildup on my Intake Valves. No matter what gas you use, Gas is not hitting these valves any more.
    I have 40,000 miles and I am curious to what they look like at this point. I've read that pretty nasty build up occurs at 7 to 15,000 miles.
    There is a whole thread on this in here somewhere. Don't want to hijack this one.

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