Gen2 Prius oil type: petroleum based, semi~synthetic, synthetic?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by priusrust, Feb 16, 2025.

  1. priusrust

    priusrust Member

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    so many related posts thought I'd cut to the chase. I'm leaning semi`~synthetic for my gen2. This ok? thanks! And if so, assume perhaps 5k mile change interval? (vs 3k with petroleum based)
     
    #1 priusrust, Feb 16, 2025
  2. bisco

    bisco cookie crumbler

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    Sure, it’s fine. You’ll never get consensus on oil
     
    #2 bisco, Feb 16, 2025
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  3. priusrust

    priusrust Member

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    thanks...suspected as much.
     
    #3 priusrust, Feb 16, 2025
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    Toyota doesn't say a thing, about conventional vs synthetic, or in-between. The stipulate spec's and a weight. 5W30 IIRC, which comes in both. I'd be inclined to use synthetic, just to play it safe I suppose, not that knowledgeable though. Here's some thoughts:

     
    #4 Mendel Leisk, Feb 16, 2025
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  5. rjparker

    rjparker Tu Humilde Sirviente

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    gen2 came with dino oil. I used full synthetic in the two I had.

    gen3 came from the factory with synthetic.
     
    #5 rjparker, Feb 16, 2025
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  6. bisco

    bisco cookie crumbler

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    and the engines blew up :p
     
    #6 bisco, Feb 16, 2025
  7. pasadena_commut

    pasadena_commut Senior Member

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    It was just ahead of its time. Now all the engines blow up.
     
    #7 pasadena_commut, Feb 17, 2025
  8. priusrust

    priusrust Member

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    Video helpful! thanks! wish he addressed "semi synthetic".....but he sort of umbrellaed it all. Very good.
     
    #8 priusrust, Feb 19, 2025
  9. rjparker

    rjparker Tu Humilde Sirviente

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    Semi synthetic is a blend of conventional and synthetic.
     
    #9 rjparker, Feb 19, 2025
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