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Ws gearbox oil

Discussion in 'Gen 3 Prius Main Forum' started by taxidriver50005, Nov 19, 2018.

  1. taxidriver50005

    taxidriver50005 Active Member

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    OK just done gearbox oil change on my gen 3 and a friend's gen 4 prius. Question.? Is toyota ws oil synthetic or just mineral.

    On a side note this was my second change of my gen 3 at 104,000 miles and the first change of the gen 4 at 115,000.


    The gen 4 had notably cleaner oil than gen 3 which I thought was odd, it literally came out as clean as the new stuff I put in.

    Posted via the PriusChat mobile app.
     
    #1 taxidriver50005, Nov 19, 2018
    m.wynn, Mendel Leisk and amos like this.
  2. High Mileage

    High Mileage Active Member

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    Toyota World Standard WS fluid is definitely all synthetic.
     
    #2 High Mileage, Nov 22, 2018
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  3. Mendel Leisk

    Mendel Leisk Senior Member

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    That's very interesting: the fourth gen transaxle is a radical change in design, has two shafts side-by-side I think. Maybe inherently cleaner running, less wear?
     
    #3 Mendel Leisk, Nov 22, 2018
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