Featured Mazda competes for thermal efficiency against Toyota with Skyactiv-Z

Discussion in 'Prius, Hybrid, EV and Alt-Fuel News' started by Gokhan, Jul 15, 2025 at 3:16 AM.

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  1. Isaac Zachary

    Isaac Zachary Senior Member

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    Also activated carbon canisters and such on the vehicle itself that trap the more-prevalent-to-evaporation gasoline.
     
    #21 Isaac Zachary, Jul 16, 2025 at 10:55 AM
  2. Danno5060

    Danno5060 Active Member

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    I think of clean diesel in the same vein as "clean coal".
     
    #22 Danno5060, Jul 16, 2025 at 2:58 PM
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  3. Gokhan

    Gokhan Senior Member

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    Diesel engines can run coal dust.

    Diesel was a Europe thing: the poor man’s fuel-economy means over there. It turned out that gasoline–electric hybrids were a far better technology than diesels. Europe, instead of moving on to hybrids, kept with the inferior, far less fuel-efficient and far dirtier diesel technology to date.
     
    #23 Gokhan, Jul 16, 2025 at 3:06 PM
  4. hill

    hill High Fiber Member

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    Oh brother, love it when people talk in absolutes. "My color blue is the best". "My Generation Prius is the best". "My view of diesel is the best".
    never gets old
     
    #24 hill, Jul 16, 2025 at 3:43 PM
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  5. Trollbait

    Trollbait It's a D&D thing

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    It's possible. Just not worth the effort with other options available.

    Diesel for true cars has the same issue. If fuel economy and emission regulations aren't rolled back, it may become less of an issue with future gasoline cars.

    The testing that revealed VW's cheating showed a BMW diesel meeting its emission rating.
    They can also run on vegetable oil, biodiesel, and hydrocracked vegetable oil(HVO). The latter is drop in for diesels on the road. Alcohol fuels aren't for gas cars.

    Depends on the job and needed tools. If the goal is reducing carbon emissions, mild diesel hybrids are the most economical option.

    Europeans wanted efficient, economical cars because of higher fuel taxes. The governments taxed diesel less for the same reasons it is taxed lower in the US. Concern for global warming was also on some minds early on there. Other emissions were a concern, which is why they had ULSD years before the US.

    And they wanted that before the year 2000. Toyota didn't get serious about spreading hybrid technology to the line up there until the current Corolla came out in 2018. They were selling diesel Rav4s instead of the hybrid that came to the US.

    Domestic car companies just had more sway than they should have in holding cleaner emissions in check. Which is also an issue here.
     
    #25 Trollbait, Jul 16, 2025 at 3:49 PM
  6. Gokhan

    Gokhan Senior Member

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    It looks like there is only one diesel PHEV in the world, and it gets 21 mpg combined. I’ll gladly pass. My 2021 Prius Prime Limited PHEV gets 70 mpg combined.

    GLC GLC 300 de 4MATIC AMG Line 9G-TRONIC PLUS vehicle details | Mercedes–Benz

    Last but not least, the typical Atkinson cycle is as thermal-efficient as a diesel cycle these days, and the diesel fuel has become more expensive than gasoline fuel. It is not to mention the much higher initial and maintenance costs of a diesel.
     
    #26 Gokhan, Jul 16, 2025 at 4:18 PM
  7. hill

    hill High Fiber Member

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    Looks like someone's both not looking very hard - and not reading posts that try to help with a basis of knowledge. Maybe read posts above? post #4 refers to the plug-in hybrid diesel Volkswagen that gets well over 200 MPG. So yea - over 10X better than the alleged "only one in the world". It was a limited production but it shows the potential for diesel phev's.
     
    #27 hill, Jul 16, 2025 at 5:06 PM
    Last edited: Jul 16, 2025 at 5:14 PM
  8. Gokhan

    Gokhan Senior Member

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    A PHEV gets ∞ mpg in the BEV mode. This is the same with any PHEV. The 21-mpg PHEV I linked above is specced to get 706.3 mpg (see the link), of course with the generous use of the BEV mode.

    You need to look at the “charge-sustaining (CS)” mode, which does not change the traction-battery SOC to give a meaningful mpg spec in the HEV mode. It is mentioned under the info button at the link I posted for the 21-mpg MB PHEV.
     
    #28 Gokhan, Jul 16, 2025 at 5:13 PM
  9. Isaac Zachary

    Isaac Zachary Senior Member

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    Clean coal, clean kerosene, clean diesel, clean gasoline, clean jet fuel, clean propane, clean natural gas, it's all the same, really.
     
    #29 Isaac Zachary, Jul 16, 2025 at 5:38 PM
  10. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    'Never' is rather absolute ;)
     
    #30 Leadfoot J. McCoalroller, Jul 16, 2025 at 8:39 PM
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