2018 Prius Prime - Remote Engine Start

Discussion in 'Prime Main Forum (2017-Current)' started by SydneyNJ, May 23, 2019.

  1. Prodigyplace

    Prodigyplace Senior Member

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    On my Gen 4, turning on Defrost seems to force the engine on, but I do not have a heat pump like the Prime..
     
  2. bisco

    bisco cookie crumbler

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    prime is the same, but does defrost come on in the morning if you leave it on at night, or is it auto shut off?
     
  3. john1701a

    john1701a Prius Guru

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    MAX defrost (the dedicated button) will shut off automatically. This forces the engine to start and run periodically.

    Regular defrost (the climate-control blower setting) is retained. This takes advantage of electric-only operation.
     
  4. bisco

    bisco cookie crumbler

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    will any settings guarantee engine start with a full traction battery, regardless of outside temp?
     
  5. Salamander_King

    Salamander_King Senior Member

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    No, I don't think so. Only when extremely cold, like near 0F or below, ICE will come on regardless of the heat setting. At below 14F, if you keep the heat ON, ICE will come on. Meaning above 14F, the only way to force the ICE to come on is to keep the traction battery not charged.
     
    #45 Salamander_King, May 25, 2019
    Last edited: May 25, 2019
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  6. jb in NE

    jb in NE Senior Member

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    As previously noted, engine warmup is not required or desired. In my opinion, you are wasting your money to install an aftermarket system that does something that doesn't need to be done. And may cause you warranty problems in the future.
    But, it's your money.
     
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  7. SydneyNJ

    SydneyNJ Junior Member

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    Unless you (or someone) can point me to the manual that says warming up the engine is unneccessary, I'm going
    to stick with driving habits which is to warm up the car for at least 5 mins during low temps. As I said before,
    if I don't this on my 2008 Lexus CT200h (hybrid), you can hear the noise from the engine is much louder and working
    harder. But if you let it warm up, the engine quiets down and the drive is much smoother. Yes, 2008 is about 10 years
    ago. But I don't think you can say a 2008 Lexus is not a modern vehicle either. I don't know. I have been taught
    that way and I think I am going to stick with this driving habits. It's OK to disagree.

    Let me call up Toyota HQ and see what they say next week.

    Will post updates ...
     
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  8. jb in NE

    jb in NE Senior Member

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    On page 99 of the 2018 Prime owner manual, the following statement appears at the end of the page:

    "◆ Warming up before driving

    Since the gasoline engine starts up and cuts out automatically, warming up is not necessary."​

    But, if the engineers who designed the car don't convince you, there are any number of websites that discuss this issue: Car Talk, AAA, etc. Here is the snippet from AAA, the others read pretty much the same.

    "Want to know if you really need to warm up the car engine before driving, even during the cold winter months? AAA provides auto care tips that help you keep your vehicle running smoothly every season of the year.

    Myth: To improve performance, particularly in cold weather, allow the engine to run for a few minutes before driving.

    Fact: Start the engine and allow it to idle only for the time it takes you to fasten your seat belt. This ensures that lubricating oil gets to all of the engine's vital parts. Driving the car normally and avoiding hard acceleration brings the engine to a warmer temperature faster, and also reduces wear and exhaust emissions. Naturally, a little longer idle time is ok in winter while you clear snow and ice from the windshield and other car parts."​
     
    #48 jb in NE, May 25, 2019
    Last edited: May 25, 2019
  9. Salamander_King

    Salamander_King Senior Member

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  10. SydneyNJ

    SydneyNJ Junior Member

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    jb in NE: I did see that last bullet point on pg99. I guess I should be convinced now? :)
    No specific mentioning of the environment the owners live in. This is good for the PRIME owners living in AZ or TX. :)
     
    #50 SydneyNJ, May 26, 2019
    Last edited: May 26, 2019
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  11. jb in NE

    jb in NE Senior Member

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    You should be convinced now. The advice applies in all climates - the car never requires an idle warmup.
     
  12. bisco

    bisco cookie crumbler

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    does the 08 lexus require synthetic oil?
     
  13. SydneyNJ

    SydneyNJ Junior Member

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    bisco: i always put synthetic oil since i bought my 2008 Lexus CT200h if that's what you were asking.
    it's recommended but i do not believe it's required.

    jb in ne: i'm looking forward to winter now so i can test. :)
     
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  14. jb in NE

    jb in NE Senior Member

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    What will you be testing? Page 48 of your 2008 Lexus manual says:

    "Warming up before driving
    Since the gasoline engine starts up and cuts out automatically when cold, warming up the engine is unnecessary. Moreover, frequently driving short distances will cause the engine to repeatedly warm up, which can lead to poor fuel economy"
    Note that an idling engine gets zero mpg.
     
  15. Raytheeagle

    Raytheeagle Senior Member

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    You sure the ct200h is from 2008:whistle:?
     
  16. jb in NE

    jb in NE Senior Member

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    If you want to test, get the Android app Hybrid Assistant, which will show you your temperatures. There is a companion app called Hybrid Reporter that summarizes each trip and graphs data, provides summaries, etc. One of the things it can report is time to temperature, particularly engine coolant temperature. Here is an example of the start of a recent road trip. Started the car in EV mode, drove through town to the interstate on EV and shortly before I got to the Interstate shifted to HV. As you can see, the car warms very quickly. And, there isn't a huge difference when it's colder outside - the grille shutters are closed and the engine warms quickly.

    upload_2019-5-26_9-59-23.png
    upload_2019-5-26_10-0-24.jpeg
     
  17. SydneyNJ

    SydneyNJ Junior Member

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    Raytheeagle: my bad. It's a 2011. That's the year where they had the Fukushima nuclear disaster. I remember I was
    put on a waitlist to get this. So it's 2011 Lexus CT
     
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  18. SydneyNJ

    SydneyNJ Junior Member

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    jb in ne: Are those android apps part of the car purchase? I know I can download some apps as of the package but I have not
    downloaded any of them. One of them is to remote start. This is probably hooked to SafetyConnect.
     
  19. jb in NE

    jb in NE Senior Member

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    No. Completely separate from the car and its software. I run it on an old Samsung tablet. The software is shareware and the specific OBD adapter it likes was less then $40.
     
  20. SydneyNJ

    SydneyNJ Junior Member

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    I know this question is completely unrelated to my original post.

    Just curious ... How much are you guys paying electric per charge on the Prime? I know the 2018 Prime capacity
    is 8.8kwh.
     
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