Mobil 1 Advanced Fuel Economy 0w-8 - Canada

Discussion in 'Gen 5 Prius Main Forum' started by Probity, Oct 31, 2025 at 4:13 PM.

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  1. KMO

    KMO Senior Member

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    My one-hour subscription ran out, so my final report is that there's whole new NCF specification pages for 202507!

    The only difference I spotted is that the engine power spec has been raised from 111kW to 112kW, for the HEV only. Woo! Maybe a bit less oil resistance?

    And maybe the PHEV is held back by its balance shaft...
     
    #21 KMO, Nov 2, 2025 at 10:28 AM
  2. VelvetFoot

    VelvetFoot Member

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    Another thing I didn't know, thanks.
     
    #22 VelvetFoot, Nov 2, 2025 at 10:30 AM
  3. Mendel Leisk

    Mendel Leisk MMX GEN III

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    There's one Owner's Manual for both the States and Canada, as far as I know. It was thus in past. Any variations between the two countries are noted.

    FWIW, if I had a 5th gen, I'd continue to use 0W20, figure it's thin enough already.
     
    #23 Mendel Leisk, Nov 2, 2025 at 11:25 AM
  4. Probity

    Probity New Member

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    Thanks. “Oil Enthusiast” – quite the hobby.

    Makes sense that the Canada retail sales restriction is more marketing related than regulatory than technical.

    I had many dealings with XOM during my working life, but almost exclusively on the upstream side, my only downstream side exposure was mainly getting educated over the years on ExxonMobil Chemicals base oils for drilling fluids applications, internationally sourced diesel, and anecdotally what my company’s downstreamer’s told me about the XOM (RasGas) gas-to-liquids plans in Qatar before they scrapped it in 2007.
     
    #24 Probity, Nov 2, 2025 at 12:02 PM
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  5. Gokhan

    Gokhan Senior Member

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    Why not 5W-30. LOL
     
    #25 Gokhan, Nov 2, 2025 at 4:40 PM
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  6. Gokhan

    Gokhan Senior Member

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    They have also eliminated the PHEV charge mode in 2026. Could it be oil-related?

    The elimination of the oil-level sensor is probably cost cutting because of Trump tariffs. It could be the same for the charge mode. There could be more function eliminations in 2027 to keep up with the tariffs.

    I don’t expect a 1% increase in horsepower by going to 0W-8. It is probably just new roundoff.

    Again, I doubt anything has changed on the engine, other than cost cutting on the oil-level sensor and some other cost-cutting measures.
     
    #26 Gokhan, Nov 2, 2025 at 5:14 PM
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