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Royal Purple question

This is a discussion on Royal Purple question within the Drivetrain forums, part of the LSx Technical Help Section category; I just bought this for my M6 car. I guess I should have asked first, but just making sure for ...

  1. #1
    nothing to prove LOCKDOWN's Avatar
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    Light Metallic Pewter
    1999 Camaro Z28

    Royal Purple question

    I just bought this for my M6 car. I guess I should have asked first, but just making sure for the last time before I put this in my car that this is the right stuff. thanks

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    Member silverz28camaro's Avatar
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    sebring silver
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    yes. i have it in my 2000 z28 auto , running 12.9 @109 no problems.

    this fluid is compatable with all posi units and is a 75 90 weight whick is a little lighter than regular gear oil but works great, this slightly thinner oil helps dissapate heat and reduces drag.. good stuff i also use 10w 30 in my engine

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    nothing to prove LOCKDOWN's Avatar
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    Thanks, all ready to put it in and start the season now

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    Member stanger88's Avatar
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    Black on black.
    2001 WS6 M6 (stock)

    I run RP 85-140 in my diff (stock Tosen)

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    I run RP 85-140 in my diff (slp Tosen hd)

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by silverz28camaro View Post
    yes. i have it in my 2000 z28 auto , running 12.9 @109 no problems.

    this fluid is compatable with all posi units and is a 75 90 weight whick is a little lighter than regular gear oil but works great, this slightly thinner oil helps dissapate heat and reduces drag.. good stuff i also use 10w 30 in my engine
    Actually it's not. Not supposed to use syn if you have the Auburn diff. Personally I'd use regular dino 80/90. I tried Redline in my old 10 bolt years ago and started getting one wheel peels.

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    nothing to prove LOCKDOWN's Avatar
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    Quote Originally Posted by INMY01TA View Post
    Actually it's not. Not supposed to use syn if you have the Auburn diff. Personally I'd use regular dino 80/90. I tried Redline in my old 10 bolt years ago and started getting one wheel peels.
    This is probably a stupid question lol, but how do I know if I have the Auburn diff. ?

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    Senior Member INMY01TA's Avatar
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    I don't think it was an option for a 99Z.

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    nothing to prove LOCKDOWN's Avatar
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    Quote Originally Posted by INMY01TA View Post
    I don't think it was an option for a 99Z.
    ok, thanks

  10. #10
    Retired NOT tired SteveC's Avatar
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    Quote Originally Posted by silverz28camaro View Post
    this fluid is compatable with all posi units and is a 75 90 weight whick is a little lighter than regular gear oil but works great, this slightly thinner oil helps dissapate heat
    Incorrect information, Aubern recommends not using synthetic oil in their posi units, and the THICKER the oil, the larger the molicules, which disapates heat quicker. I use 85W-140 dino oil.

    SteveC

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