Need advice on when to change break in oil

Discussion in 'Shelby GT350 Mustang' started by dom418, Oct 14, 2019.

  1. dom418

    dom418 Well-Known Member

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    My 18’ 350 R has about 100 miles on it with the original oil. Would you recommend changing it before winter storage?

    from what I understand the break in oil is there for a reason and at this point I may never hit 1000 miles
     
  2. nastang87xx

    nastang87xx Well-Known Member

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    I autocrossed my car at 200 miles and did my first oil change at 4500 miles. According to the internet, my engine should have blow up so violently that you would have felt it on the other side of the globe. 19,000 miles later, plenty of track days, hundreds of autocross runs, and various daily driving situations later, tight as a drum with no oil consumption issues or strange valvetrain noises.
     
  3. MikeR397

    MikeR397 Well-Known Member

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    I say change it before you even drive, it’s “cheap insurance.”

    In all seriousness, change it when your dash oil life (in settings) says to change it.
     
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  4. Rainier42

    Rainier42 Well-Known Member

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    Factory fill is not break-in oil ... is Motorcraft 5w50.
     
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  5. MikeR397

    MikeR397 Well-Known Member

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    Correct.

    follow the dash oil computer which is already conservative and accts for engine use revs and you’ll be fine (or at least doing everything you can do).
     
  6. VRYALT3R3D

    VRYALT3R3D Well-Known Member

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    I always change every 5k miles or 6 months, whichever comes first.
     
  7. galaxy

    galaxy Well-Known Member

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    This^^. There is no break in oil. It may have some dye in it to spot potential leaked after assembly, but that’s it.

    I did mine at 1,000 based solely off what I wanted to do.
     
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  8. Phoenix

    Phoenix Instagram: PhoenixNFA

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    when the light tells you to.
     
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  9. Caballus

    Caballus Well-Known Member

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    Funny. There was just what in my opinion was a pretty good oil thread that was designed to answer these basic questions. Needed some tweaking, but overall good consolidation of a lot of basic info. Disappeared...
     
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  10. galaxy

    galaxy Well-Known Member

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    Woah. Interesting. Everyone busted his balls pretty hard, but it actually was a pretty good consolidation of info.
     
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  11. svassh

    svassh Well-Known Member

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    I bought my used 2018 in August with 1500 miles. Changed the oil myself, what a waste.... Filter was just as clean as a new one and oil had new color. Not knowing the history of the car I felt better doing it but as others have already said, unnecessary.
     
  12. JAJ

    JAJ Well-Known Member

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    Except for the bit about the wrong-sized oil filter wrench.

    As to the OP's question about changing the oil the first time, I'd go with the car's oil change monitor as well.
     
  13. MikeR397

    MikeR397 Well-Known Member

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    It’s just a waste of $ and environmental harm to change it earlier than the Conservative computer says to. But people want to live like it’s 1975 oil technology and do it anyway.
     
  14. DylanICON

    DylanICON Member

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    I just did my first oil change at 2300 miles on my 18.
    it has about 10-15psi more now at comparable temp and RPM.
    that would make the claim in that oil article that the motorcraft oil shears down to 5-40 over use and time plausible.
    they also used the newer 2087 filter. (not sure which one I had from factory though)
    I never give time as much a factor as mileage for oil life, but the oil in my car had been in there for probably 1-1/2 years.

    for what its worth.

    edit:
    I did observe the oil pressure going down over the last few months. and now its back up
     
  15. Tomster

    Tomster Beware of idiots

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    Not to start a debate, but the oil early on has lots of contaminates. Me, personally, I'd change my initial oil at a few hundred miles.
     
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