SM 0W-20 grade engine oil instead of latest SN or SN plus

Discussion in 'Gen 3 Prius Technical Discussion' started by kamrul, Jan 19, 2020.

  1. kamrul

    kamrul Junior Member

    Joined:
    Nov 25, 2018
    15
    8
    0
    Location:
    Bangladesh
    Vehicle:
    2012 Prius Alpha
    Model:
    N/A
    Hello, I have been using SN 0W-20 grade engine oil on my Prius 2013 with 75K kilometers on it. I know SN/SN+ is the latest tech. However, I wonder what bad can happen (significant / insignificant) if I use older tech SM 0W-20 on the next change cycle?
     
  2. jzchen

    jzchen Senior Member

    Joined:
    Apr 9, 2012
    1,557
    442
    0
    Location:
    Arcadia, CA
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    The owners manual references an ILSAC grade, as long as it meets that I don't see any harm...

    moto g(7) power ?
     
  3. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    1,606
    2,167
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    As @jzchen kindly notes, the Owner’s Manual for cars sold in the U.S. calls for engine oil meeting ILSAC specifications, but Toyota’s Repair Manual (more info) series states that in Mexico and other countries, oil of these other grades and SAE viscosities can be used:

    API grade SL "energy-conserving", SM "energy-conserving", SN "resource-conserving" or ILSAC multigrade engine oil
    • 0W-20
    • 5W-20
    • 5W-30
    • 10W-30
    API grade SL, SM or SN multigrade engine oil
    • 15W-40
    • 20W-50
    On that basis, I wouldn’t expect anything terrible to happen if you used Category SM oil, provided it’s replaced at reasonable intervals. I don’t know which (if any) benefits of ILSAC or Category SN oil—summarized in the American Petroleum Institute’s “Which Oil Is Right For You?” brochure (PDF)—apply in practice to Prius cars.

    The definitions of Category SM, Category SN, and ILSAC GF-5 and its predecessors are in Annex G and Annex Q of API 1809, Engine Oil Licensing and Certification System (PDF).
     
  4. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    3,255
    2,653
    1
    Location:
    NorCal (Non Bay Area)
    Vehicle:
    2012 Prius
    Model:
    Four
    I’m using just sn, not sn + 5w-20 oil. In fact it’s not even dexos gen ii oil :sneaky:
     
Loading...