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Motor oil

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  • Duke W.
    Beyond Control Poster
    • January 1, 1993
    • 15661

    #16
    Re: Motor oil

    Go to the following link, and download the oil article pdf:

    https://www.corvetteforum.com/forums...corvettes.html

    The article was originally written in 2008 when the CJ-4 category went into effect. The current CK-4 category wear test suit did not change, nor did the P limit.

    CK-4 oil is vastly superior to the engine oils available when most vintage Corvettes were new in terms of wear protection, oxidation resistance, and other parameters. Some current CK-4 have much less than the P limit because their additive package includes newer Boron-based anti-wear additives.

    So the P/Zn level is not the sole determinant of the oil's wear protection. Regardless of the additive package, all CK-4 oils have to pass the C-category wear test suite, which is a higher hurtle than the S-category wear test suite, and since both cost about the same, why buy a S-category oil and add a ZDDP additive?

    I find that Walmart usually has the best prices on motor oil. They carry both the three major CK-4 national brands and their own SuperTech house brand, which is usually less expensive, so that's what I buy.

    In ag country there are lots of house brands. As long as they have the API "donut" with CK-4 as the FIRST listed category, they are the real McCoy

    Duke

    Comment

    • Edward B.
      Very Frequent User
      • January 1, 1988
      • 537

      #17
      Re: Motor oil

      Sticking with a brand that has a proven track record such as "Rotella," is in no way as silly as using WD-40 as a lubricant or a "rust buster," uses for which it was never intended. Advertising and spray can convenience are hard factors to overcome with common sense.

      Comment

      • Michael J.
        Extremely Frequent Poster
        • January 27, 2009
        • 7118

        #18
        Re: Motor oil

        I use VR-1 in all my C2s, and have for years, I am very happy with it.
        Big Tanks In the High Mountains of New Mexico

        Comment

        • Bernie B.
          Infrequent User
          • August 25, 2018
          • 21

          #19
          Re: Motor oil

          Thanks Michael on your reply regarding VR-1. All the posts both past and present have been very informative. Thanks Bernie

          Comment

          • William F.
            Extremely Frequent Poster
            • June 9, 2009
            • 1363

            #20
            Re: Motor oil

            Racing oil is designed for racing and as such may not have characterists that you need for a street driven machine, such as long lasting corrosion protection or maybe not as long a life as the C rated oils. The long term corrosion protection affored by C rated oils is one of its most important qualities for our mainly only occassionaly driven Corvettes.

            Comment

            • Michael J.
              Extremely Frequent Poster
              • January 27, 2009
              • 7118

              #21
              Re: Motor oil

              Valvoline VR-1 is CD rated too, CF is now an obsolete category.........vr1-racing-oil.pdf
              Big Tanks In the High Mountains of New Mexico

              Comment

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