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New gearbox oil on the block? Royal Purple?

Discussion in 'Technical Q&A' started by Mike328, Jan 27, 2004.

  1. Mike328

    Mike328 F1 Rookie
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    Oct 19, 2002
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    Mike
    The past year has seen some very lengthy threads on the right gearbox oil to use in our 308, 328, and other F-cars' transmissions (gearboxes and differentials).

    There was a fair consensus forming around using Redline 75-90 NS, in some cases with a little differential "slip" additive added to prevent differential "chatter."

    In the past months I've read a number of posts referring to Royal Purple.

    What is this stuff? Anybody use it? Is there any research that compares the properties of Royal Purple (RP) vs. Redline?
     
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  3. Mike328

    Mike328 F1 Rookie
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  4. f355spider

    f355spider F1 World Champ
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    Michael,
    I too am curious, and have seen the threads over at the "other" site. Based on JRV's experience, and others, it appears to be a winner. I am betting that the formulation, is somewhere "in between" the Redline standard gear oil (with the slip additive) and the NS (no slip additive) products, as Royal Purple states it is suitable for both applications, that is; limited slip differentials, AND synchromesh transmission. But I am just surmising from what I have read and heard...
     
  5. robertgarven

    robertgarven F1 Veteran
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    Feb 24, 2002
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    AGIP 75 90 LSX
    you can get it in liters now, easier to pour has the ls aditive in it, made in Italy, made for our cars! nuf said just added it and bought the shirt :-0

    the dog with six legs is a friend to man with four wheels
     
  6. f355spider

    f355spider F1 World Champ
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    Whew,
    After rereading all those threads, I must add that I HAVE since developed a slight bit of limited slip "chatter" (using Redline 75-90 NS)(or at least what I think is; as I may be incorrectly diagnosing it). In any event, I added 1/2% Redline limited slip additive to my gear box and noticed it seemed to help some. I have also been told that I should take the car to a parking lot and drive in reverse making a tight right, then left turn (several times) to work the lubricant into the limited slip plates. My car is is not back from the shop yet (new fuel injectors) but when I do, I will try this.
     
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  8. Mike328

    Mike328 F1 Rookie
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    Fantastic to hear the AGIP is available in liters... That I think was a top chouice. The Shell stuff that Ric Rainbolt uses is also a top choice, but I think is only available in 5-gal buckets?
     
  9. 4re gt4

    4re gt4 Formula 3

    Apr 23, 2002
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    Hans E. Hansen
    I don't know about this specific product, but Royal Purple has a very good reputation.
     
  10. BigTex

    BigTex Seven Time F1 World Champ
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    You'll note that Ferrari recommendations coincide with F1 sponsorship ties!

    Shell falls both before and after the AGIP years!

    I have used RP for a long time. It works.
     
  11. Birdman

    Birdman F1 Veteran

    Jun 20, 2003
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    THE Birdman
    I just put Royal Purple in my Celica. $10 a quart! Yikes!
     
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