1. C Morgan

    C Morgan Junior Member

    Joined:
    Jan 15, 2015
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    Vehicle:
    2006 Prius
    Model:
    N/A
    My dealer says it no longer gets 5w30 builk oil, but 5w20, which it stocks, is ok.
    Temperatures can get to 100+ where I live. Will 5w20 offer sufficient protection?
     
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Yeah that's getting water thin down there. For me anyway I'd have to look at chart in back of manual in oil section it shows the 20 range min n max temps etc. if I'm close to topping up at 20 temp max. I cannot do that the 30 has to go on I think 30 carries me to about 117 i think . But I'm not sure if even that . I know I've had it figured for about twenty years now and don't fool with it . Not an oil related issue in 40 some odd years of driving so I'll stick with..
     
  3. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
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    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    If we are talking quality full synthetic oil; it should be fine - but since your going thinner, you need to keep an eye on oil burn. How much oil will it consume in 1K - 5K - 10K mile oil change intervals your doing. You don't want to run low on oil and damage your engine.

    Good Luck....

    FWIW; whomever is doing your oil changes is FULL of IT; to put it nicely. You can walk into any store to pick up 5w30 motor oil.... Time to find another mechanic....
     
  4. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    They talking about getting the oil in bulk at the dealership they only getting 0 20 or such . So what goes in all the other vehicles that don't take 020 they don't only work on 0 20 vehicles . So all the other vehicles they service they buy the oil in quart bottles yeah okay