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Mixing oils

Discussion in 'Gen 3 Prius Main Forum' started by StevefromOhio, Aug 13, 2018.

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  1. GFO

    GFO Member

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    Vehicle:
    2012 Prius
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    Two
    Update: Did 5K on 5w-30 Castrol Magnatec Synthetic; engine didn't blow up. Biggest difference was it took a bit longer for the engine to reach operating temps where it shuts offs and a very slight hit to my MPG, which is likely from a combo of the thicker oil's parasitic drag on internal components and the engine running longer to reach temperature Engine noise was also reduced a bit; that part I liked.

    Went back to 0W-20 Castrol Magnatec Synthetic this change though.
     
    #61 GFO, Sep 5, 2019
    Merkey, Montgomery and Mendel Leisk like this.
  2. Montgomery

    Montgomery Senior Member

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    Orange County, CA
    Vehicle:
    2015 Prius
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    Two
    I used the same oil on my last change and have experienced exactly the same thing. I will be going back to 0W-20 in about 2 thousand miles.
     
    #62 Montgomery, Sep 5, 2019
    Merkey likes this.
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