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Thread: First Service

  1. #1
    pissedoffwookiee's Avatar
    pissedoffwookiee is offline Cadillac Owners Connoisseur
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    First Service

    5600 miles had my first oil change averaged 17.7 MPG (I have a heavy right foot)

    I had the dealer upgrade to Mobil 1 and reset my fuel economy, I've only had it an hour after the service, but car feels smoother..... I am entirely aware that the difference between Mobil dexos and Mobil 1 that I'm feeling could be in my head, I'm interested to find out


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  3. #2
    Ragtop 99's Avatar
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    Re: First Service

    Hopefully you're not burning oil and assuming you weren't accidentally running 140w gear oil before the switch, I'd say it's all in your head.

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    pissedoffwookiee's Avatar
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    Re: First Service

    i totally thinks its in my head but i swear it idles less lumpy when cold...lol

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    AIRASSAULT18B is offline Cadillac Owners Member
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    Re: First Service

    All of the Mobil 1 I have bought in the last year has the Dexos label.

  6. #5
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Oil has ABSOLUTELY NOTHING to do with how smooth an engine runs or idles. "Smooth running" is dependent on proper combustion, not the microns of oil film between the bearing surfaces. If an engine is running rough because of anything related to bearings or lubrication, it has about a minute before it seizes or throws a major component through the block.

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    pissedoffwookiee's Avatar
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    Re: First Service

    Quote Originally Posted by AIRASSAULT18B View Post
    All of the Mobil 1 I have bought in the last year has the Dexos label.
    DEXOS is a certification and an oil that just tells you that Mobil 1 meets or exceeds the specifications for cars that requires DEXOS

    ----------

    Quote Originally Posted by MoistCabbage View Post
    Oil has ABSOLUTELY NOTHING to do with how smooth an engine runs or idles. "Smooth running" is dependent on proper combustion, not the microns of oil film between the bearing surfaces. If an engine is running rough because of anything related to bearings or lubrication, it has about a minute before it seizes or throws a major component through the block.
    this is more than in my head, it's extremely subtle, but the car feels/sounds more refined, like a very slight edge has been taken off this could be placebo, but what i know for sure is not placebo is without a change in gas (i use shell premium almost exclusively) or a change in my routine my mileage went up almost 3 MPG from 17.7 to 20.4

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    MoistCabbage's Avatar
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    My car is faster after I wash it.

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    AIRASSAULT18B is offline Cadillac Owners Member
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    Re: First Service

    I am entirely aware that the difference between Mobil dexos and Mobil 1 .pissedoffwookiee





    When you said this it sounded like you thought there were two different oils. If you found the Mobil1 made before the certification it would not be Dexos. For the last year they have be Dexos certified.

  10. #9
    pissedoffwookiee's Avatar
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    Re: First Service

    Quote Originally Posted by MoistCabbage View Post
    My car is faster after I wash it.
    this is true, F1 cars get polished before every race for this reason, the difference is tiny but it is there

  11. #10
    GJB's Avatar
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    Re: First Service

    Quote Originally Posted by MoistCabbage View Post
    My car is faster after I wash it.

    Same here, You must use high speed low drag polymers...

  12. #11
    pissedoffwookiee's Avatar
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    Re: First Service

    Quote Originally Posted by AIRASSAULT18B View Post
    I am entirely aware that the difference between Mobil dexos and Mobil 1 .pissedoffwookiee





    When you said this it sounded like you thought there were two different oils. If you found the Mobil1 made before the certification it would not be Dexos. For the last year they have be Dexos certified.
    dont think it much matters, Mobil 1 pre and post certification would always be better than the DEXOS synthetic blend that comes stock in the car, whats interesting is GM is actually going backwards and approving DEXOS synthetic blend on cars that previuosly were to have Mobil 1 like the escalade

  13. #12
    100%_N1's Avatar
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    Quote Originally Posted by MoistCabbage
    My car is faster after I wash it.
    Haha. And the R sticker that the ricers put on the back of their Honda Civics adds about 4.5 horse power.


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