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1948 chief motor rebuild

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  • 1948 chief motor rebuild

    Just had my 48 chief motor rebuilt ,any recommend oil that I should use during break in ? Thanks

  • #2
    My builder supplied me with Brad Penn conventional 50W Break-in oil: 3 Qts.
    Changed that at 500 miles and have been using Valvoline VR1 conventional 50w high zinc
    since. Change often.

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    • #3
      "W" does not mean weight.
      The Linkert Book

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      • #4
        Originally posted by kitabel View Post
        "W" does not mean weight.
        You are correct, the "W"stands for winter.

        "The "w" in motor oil stands for winter. The first number in the oil classification refers to a cold weather viscosity. The lower this number is, the less viscous your oil will be at low temperatures. For example, a 5W- motor oil will flow better at lower temperatures than a 15W- motor oil. "
        Online search quote

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        • #5
          "Teachable moment"

          Well this just proves that for important things I can NOT rely on my memory
          I was WRONG.

          Took a look in the garage (kept one of the old oil containers)
          Actually

          PENNGRADE
          High Performance Break-In Motor Oil
          SAE 30
          Contains high levels of Zinc and Phosphorus

          But I was right about what I am running now, so there's that.
          Attached Files

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          • #6
            I run 60w in my Shovelheads.

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            • #7
              Where did you have your motor rebuilt?

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