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Is The Prius C Also Affected By Oil Burning?

Discussion in 'Prius c Main Forum' started by Lukey51, Jan 20, 2020.

  1. sam spade 2

    sam spade 2 Senior Member

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    Not necessarily.
    All of the same parts are there.....except maybe for fewer cylinders.
    The compression might be less or more.
    Might not be more efficient, depending on the comparison, because it might need to run faster and harder to make the necessary HP.
     
  2. Sonic_TH

    Sonic_TH Active Member

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    That's correct, but in the case of cars like this one on topic, and all cars that are heading to being efficient and reliable, a smaller engine will have less moving parts, and will generate less heat, and use less fuel.
     
  3. sam spade 2

    sam spade 2 Senior Member

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    The number of parts will NOT be different if the smaller engine has the same basic design and the same number of cylinders.

    And the smaller engine might actually NOT use less fuel or generate less heat if you have to push it harder or run it faster to get the desired results.

    While your generalities might often be true, they are not always true.
     
    RobAustin and Aaron Vitolins like this.
  4. Sonic_TH

    Sonic_TH Active Member

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    They are not always correct, but in this case the engine indeed produces less heat, being this smaller, and indeed uses less fuel, being this smaller. Since the car weight less, i don't have to push the engine much to get to the desired speed, and in most cases you can accelerate in the most efficient way possible depending on circumstances, using less fuel. But if you try to move heavy objects with a small engine, the small engine will be less efficient than a bigger one in that regard.
     
  5. goku2

    goku2 Junior Member

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    That literally has nothing to do with whether or not a car burns oil. Engine displacement, heat, hp, all irrelevant metrics. The reason the Prius C doesn't burn oil is because they resolved the oil burning issues with that engine which were a problem when it was used in the 2004-2009 Prius. The reason the 1.8L burns oil is the same reason the 2.4L 2AZ-FE or even the newer 2AR-FE burns oil... bad design. Toyota either needs to elect usage of better oil or change the design of the engines or pistons so that they don't get gummed up with carbon deposits. Better oil flow usually cools the oil down so that it doesn't get hot enough to burn inside the oil control rings and therefore gum them up. That's why most repairs are just revised pistons and rings.
     
  6. orangecones

    orangecones Member

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    AFAIK the oil burning is largely contained to the 2011/2012 regular size Prius with the 1.8. Not entirely sure if 2013+ were altogether fixed, but the issue has definitely been mitigated. That said, if budget allows, the newer the better, but if you're looking for a Gen 3 - 2014 should be your bottom year. That's when they added more high strength steel to do better in small overlap situations. That - and gives you an extra year buffer removed from the known oil burning engines.