1. Attachments are working again! Check out this thread for more details and to report any other bugs.

oil consumption fixed(?)

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by rufuslyon, Jul 17, 2024.

  1. rufuslyon

    rufuslyon Junior Member

    Joined:
    Sep 8, 2018
    15
    23
    0
    Location:
    los angeles
    Vehicle:
    2007 Prius
    Model:
    N/A
    hey guys/girls! I recently replaced the head gasket on my 2010 Prius (250k miles) I found this video explaining that a clogged EGR cooler can be major culprit for the notorious oil consumption. With everything apart, I inspected my egr cooler and found that it was completely clogged. I soaked it in oven cleaner for a couple days and then flushed it out with a pressure washer at my local car wash (wear eye protection). I also switched my motor oil to the new Valvoline restore and protect. Just did my first oil change and noticed that I was only down .5qt over 5k miles instead of my old average of 1-1.5qts every 2-2.5k miles.

    I don’t know if it’s because I cleaned out my EGR valve/cooler or the oil cleaning the gunk out from behind the oil control rings as advertised or the combination of both but it seems to be working.

    I’ve also tried the MMO/seafoam piston soak in the past and it didn’t do anything.

    just wanted to share in case this helps any of you

     
    #1 rufuslyon, Jul 17, 2024
    Last edited: Jul 17, 2024
    ForestBeekeeper and JC91006 like this.
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    10,373
    1,792
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Generally with these it turns out to be more of the oil control range I didn't look at your mileage but I imagine it will return but no big deal it's real common
     
    #2 Tombukt2, Jul 17, 2024
  3. rufuslyon

    rufuslyon Junior Member

    Joined:
    Sep 8, 2018
    15
    23
    0
    Location:
    los angeles
    Vehicle:
    2007 Prius
    Model:
    N/A
    yeah, I’m not expecting it to be like factory new. all ice burn some oil. it just brings a little peace of mind knowing that I’m not gonna grenade my motor from oil starvation on a long road trip.
     
    #3 rufuslyon, Jul 17, 2024
    ForestBeekeeper likes this.
  4. ForestBeekeeper

    ForestBeekeeper Active Member

    Joined:
    Sep 19, 2011
    744
    289
    0
    Location:
    Maine
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I am glad to see that this helped. :)
     
    #4 ForestBeekeeper, Jul 17, 2024
  5. Lares_Mat

    Lares_Mat Member

    Joined:
    May 17, 2014
    175
    50
    0
    Vehicle:
    2009 Prius
    Model:
    III
    Sorry, I have to write this...

    In this video between time mark 1:30 and 3:00 the guy is talking complete nonsense about EGR system and others.
    He most probably _can_ work on engines (as the whole video shows), but the explanation between the two time marks is _not_true_!
    I do even not want to discuss this - every one can read about EGR system and learn it right, I want only point it out: here the explanation is wrong.

    Mat
     
    #5 Lares_Mat, Jul 18, 2024
  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,671
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Basically saying the EGR valve becomes the throttle body, once the engine’s warmed up. :rolleyes:

    His business model relies on blown head gaskets, so it’d be counterproductive to actually think it through.
     
    #6 Mendel Leisk, Jul 18, 2024
  7. bbrages

    bbrages Member

    Joined:
    Feb 20, 2023
    113
    26
    0
    Location:
    St. Louis
    Vehicle:
    2005 Prius
    Model:
    N/A
    The basic flaw in what he's saying is exhaust gas in a SI engine is less than 1% O2, so it doesn't work like "air".

    To a minor degree, it works the opposite of what he's saying - more EGR reduces volumetric efficiency (without pumping losses, yay!)
     
    #7 bbrages, Jul 18, 2024
(You must log in or sign up to post here.)