Mobil 1 Syn Question
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This is a discussion on Mobil 1 Syn Question within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have been hearing of people with spun rod bearings while using Mobil 1 Syn. Has anyone heard of this? ...

  1. #1
    Registered User
    Join Date
    Apr 2006
    Windsor, Ca

    Mobil 1 Syn Question

    I have been hearing of people with spun rod bearings while using Mobil 1 Syn. Has anyone heard of this? If this has been a problem, which oil is the "suggested" oil to use?

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  3. #2
    Join Date
    Jun 2007
    Great Salt City of Utah
    Hope not. I am running 10w30 right now. I had 5w-30 but it was running like ass in the heat.

  4. #3
    Super Moderator (Actually a SuperSpy) SD_GR's Avatar
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    Jul 2002
    CA, US
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    Quote Originally Posted by langridge View Post
    I have been hearing of people with spun rod bearings while using Mobil 1 Syn.

    What indication is there that the oil was the source of the failures? If none, what colour were their cars?

    Has anyone heard of this?


    If this has been a problem, which oil is the "suggested" oil to use?
    Check your manual for the recommended oil type and viscosity.

    I've seen no data that indicates M1 is not suited for our motors. I've seen a lot of data showing M1 does very well in our motors. Here are some oil analyses for the WRX, and you can pick an oil for yourself based on the data:

    M1 5W-30 over endless miles, great results and solid performance:

    M1 10W-30 with short commutes (tough on oil):

    M1 5W-40 Truck/SUV, now sold as M1 Turbodiesel (for my money, the best oil Mobil sells in the USA):

    M1 10W-30 with 7,500 miles on it:

    and so on and so forth.

    You can repeat the search using your oil of choice as a keyword and get other info and chose your own oil with your own criteria.

    Happy shopping.
    The world breaks everyone and afterward many are strong in the broken places. But those that will not break it kills. It kills the very good and the very gentle and the very brave impartially. If you are none of these you can be sure it will kill you too but there will be no special hurry. Ernest Hemingway, A Farewell to Arms, 1929
    WRX Info Links, Courtesy TheJ
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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  6. #4
    SuperNova 06wrx4me's Avatar
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    Jun 2006
    Nor Cal
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    I'm with SD_GR.

    Never heard Mobil 1 was the problem.
    2016 Challenger Scat Pack
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  7. #5
    Registered User big_sur's Avatar
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    Sep 2006
    Goode, VA
    i use the mobil, no problems so far

  8. #6
    Registered User Micah's Avatar
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    Oct 2005
    Ocean Grove, NJ
    +1 I've been using M1/Royal Purple and haven't had any issues - changing every 3000-5000 depending on how dirty it looks and how often I get around to having it changed.

    If you are willing to spend the money and a small amount of time, oil analysis is the way to go. I worked for a Limo company that performed oil analysis for a while instead of regular intervals for changing the oil. It saved them quite a bit of money - however these were mostly towncars and various stretches, most of the stretches have increased oil capacity. For a fleet it would be a no brainer in my eyes to do the analysis route.
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