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Thread: PennGrade equates to Brad Penn?

  1. 10-31-2022, 03:27 PM #1
    dummkopf
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    Question PennGrade equates to Brad Penn?

    I guess this is correct? What is the difference between this and say Castrol of the same weight? It has something it it? Zinc? Or what?

    I can get a case for $100 to 115 on Amazon. I want it to be right.

    Thanks!
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  2. 10-31-2022, 03:41 PM #2
    Chuck Miller
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    PennGrade equates to Brad Penn?
    That is correct .....

    I've only used PennGrade in my 911 (Brad Penn) for years....
    That is, ever since I switched from Kendall GT1... A whole other story...

    As to your other questions ..... I'd say that's a 'jump ball'...

    Cheers,
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  3. 10-31-2022, 08:26 PM #3
    dummkopf
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    Thank you sir! That is what I needed to know!
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  4. 11-14-2022, 08:25 AM #4
    Cliff
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    What weight is recommended for South West type weather.
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  5. 11-14-2022, 09:42 AM #5
    72targa
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    Here are two product data sheets for your perusal. The main takeaway for this part of the discussion, when comparing SAE 20W-50 oils listed, is the Zinc level. The Brad Penn has roughly twice as much Zinc as the modern counterpart (API rated), indicating a higher level of ZDDP as used to protect from wear. The Brad Penn product should not be used in a modern car with a catalytic converter as the related higher phosphorus (as a component of ZDDP) will destroy it.
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