1. HamiltonGII

    HamiltonGII New Member

    Joined:
    Mar 13, 2015
    2
    0
    0
    Location:
    maine
    Vehicle:
    2009 Prius
    Model:
    II
    Just bought a 2009 with 170k on it and spoke with the driver at the company who had a fleet of Prius II's. He said they all started burning oil after about 100k (2qts between oil changes at 6k mi intervals). Is this typical? I was shocked to here this and was wondering if there are any solutions out there?
     
  2. jadziasman

    jadziasman Prius owner emeritus

    Joined:
    Jan 17, 2011
    1,355
    473
    0
    Location:
    District 6
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Bring the car back.......just kidding.

    The Gen 2 engine at 1.5L is puny . It has to do quite a bit of lifting during its life with charging the traction battery and what not.

    Some Gen 2 owners have been lucky and their cars haven't been burning oil after 100K miles but some, like me, have had to deal with it since we bought ours. I bought my 05 Gen 2 with 134K miles in late 2010 and it now has 232K miles. It burned oil when I bought it and it still does. The OC hasn't increased drastically over the 98K miles I've driven it. It burns about a qt every 2500 miles now. Not great but not that bad either.

    In the grand scheme of things, oil consumption is a small price to pay for a very reiliable car that gets excellent fuel economy. Just keep checking the level every 1000 miles and top off as needed and you should have no problems otherwise. I haven't.
     
  3. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,143
    6,180
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    1. Before you look for a solution, see what the engine oil consumption rate on your car is.
    2. If it turns out the engine is consuming oil, the least expensive solution is just to add some oil as needed.
    3. You could also replace the PCV valve, that might help and would not hurt.
    4. If there are no engine performance issues, no visible exhaust smoke and the car passes local emissions control testing, why would you spend four-digits to have a replacement used engine installed? That would be the best solution but that is like using a sledgehammer on a fly.
     
    #3 Patrick Wong, Mar 13, 2015
    Last edited: Mar 13, 2015
    Merkey likes this.
  4. alekska

    alekska Active Member

    Joined:
    Feb 14, 2010
    435
    135
    0
    Location:
    Atl
    Vehicle:
    2005 Prius
    I have 2005 with ~160k miles and it does not burn any oil between changes. I change oil at ~7-8k miles. The car has been on Mobile 1 full synthetic all its life.

    - Alex
     
  5. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    89,731
    40,208
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    this is the second 'shocked to hear some high mileage prius burn oil' thread in a week.
     
  6. littlehandegan

    littlehandegan Junior Member

    Joined:
    Oct 13, 2014
    80
    13
    0
    Location:
    Charleston, SC
    Vehicle:
    2005 Prius
    It is fairly common, but not a bid deal.

    I have 125K on my 2005 and burn no oil between 3K miles OCI on dino.
     
  7. uart

    uart Senior Member

    Joined:
    Sep 7, 2009
    4,215
    1,180
    0
    Location:
    Australia
    Vehicle:
    2005 Prius
    Yeah a little bit of oil consumption is quite common on these once they're at that sort of mileage. Make sure you monitor it closely over the first 5 or 6 thousand miles, and make sure you top off regularly (as needed).

    A quart every 3000 miles or so is definitely not the end of the world. Oil is cheap, just top off as needed.

    BTW. I'm at about 145,000 miles right now and I guess I'm burning about a quart every 7000 miles.
     
  8. N.J.PRIUS

    N.J.PRIUS Member

    Joined:
    Mar 23, 2011
    136
    47
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2013 Prius Plug-in
    Model:
    Plug-in Advanced
    I have 122,000 on mine and use synthetic and go 10,000 between oil changes. Does not use a drop of oil yet (knock on wood)!
     
  9. HamiltonGII

    HamiltonGII New Member

    Joined:
    Mar 13, 2015
    2
    0
    0
    Location:
    maine
    Vehicle:
    2009 Prius
    Model:
    II
    I spoke to the people that have worked on my cars for the last 30 yrs. The have always recommended oil changes at 3k mi. They also have just gained the trust of a local prius club and now have over 2 dozen that come to them for service. None of these cars has reported oil consumption issues with some of these cars @ 250 to over 300k on them. They did say that the 5w-20 oil's ability stand up to a 5 to 7500 mi oil change interval is in question. They feel the stuff breaks down well before the standard service interval recommended by Toyota and there is scuttle butt in the industry that may lead to recommendation changes for the standard service interval.
    Guessing your use of Mobil 1 is why you aren't having issues.
     
  10. exstudent

    exstudent Senior Member

    Joined:
    Jul 11, 2009
    2,207
    863
    0
    Location:
    Torrance, CA
    Vehicle:
    2007 Prius
    I'm jealous. 133,000 miles, current rate of oil consumption is maybe 1/4 - 1/3 quart, between the 5,000 mile dinosaur oil changes.
     
  11. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,143
    6,180
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    5W-20 is not a recommended viscosity for North American 2G Prius. 5W-30 is the recommended viscosity.

    3K mile oil change intervals sounds good from the point of view of helping the mechanic's revenue stream. I do not think that is necessary from the Prius owner's point of view, 5K or 7.5K mile intervals are adequate.

    Before an oil consumption issue can be reported, the owner has to actually monitor oil level over time and notice whether it changes or not. Many owners do not think this is something they need to do. Once the Prius odometer hits six digits it would be wise to check oil level at every other fill-up, as it is possible for sudden changes in oil consumption behavior to occur.

    Further, the distance between the two dimples in the oil dipstick represents 1.6 US quarts. Some owners think the distance corresponds to 1 quart and hence underestimate the amount of oil being consumed. The true test is to see how much oil has to be added to bring the oil level back to a specific spot on the dipstick, after accounting for time needed for the oil to drain down from the cylinder head into the crankcase.
     
  12. uart

    uart Senior Member

    Joined:
    Sep 7, 2009
    4,215
    1,180
    0
    Location:
    Australia
    Vehicle:
    2005 Prius
    People doing 3000 mile oil change intervals rarely report oil consumption simply because it's not a long enough interval to notice unless it's severe. Also other things like short trips and fuel contamination can influence the apparent consumption.

    In the US 5W20 is not recommended for the gen2 Prius so it's a moot point.

    It's unlikely to be directly related to any one magic brand of oil or any magically low oil change interval. There are several users here reporting only ever using "dino" (mineral) oil and still having no oil consumption at high mileage.

    When it comes to oil related issues there is no end of anecdotal evidence that can lead you to false conclusions.
     
    #12 uart, Mar 14, 2015
    Last edited: Mar 14, 2015
  13. Britprius

    Britprius Senior Member

    Joined:
    Jun 14, 2010
    5,194
    1,853
    0
    Location:
    Herefordshire England
    Vehicle:
    2008 Prius
    While in general I agree with what you have said. Toyota in some countries seem to have changed the recommended oil to 0w-20 at some point in 2008. My car is just one such example in that both the hand book and the filler cap state to use 0w-20 oil, and there are others here on PC that have reported this.
    My UK Prius has now covered 113,000 miles always with 0w-20 oil and uses no measurable oil at the Toyota recommended 10,000 mile oil change interval.

    John (Britprius)
     
    Data Daedalus likes this.
  14. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    89,731
    40,208
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    when you buy a 6 year old car with 170,000 miles, you have no idea of the type of driving and possible abuse it has seen. nor do you know the level of service unless it is completely documented. to expect it to burn as little oil as when new is positive thinking but not realistic.
     
    Data Daedalus likes this.
  15. uart

    uart Senior Member

    Joined:
    Sep 7, 2009
    4,215
    1,180
    0
    Location:
    Australia
    Vehicle:
    2005 Prius
    I agree with you John. A good quality 0W20 should be fine. Modern synthetics hold their viscosity and shear down less than older technology oils anyway. :)
     
    Data Daedalus likes this.
  16. ktyler2

    ktyler2 Junior Member

    Joined:
    Mar 13, 2015
    25
    5
    0
    Location:
    Utah
    Vehicle:
    2009 Prius
    Model:
    Two
    I'm currently using a 5w-30 dino oil. Is it a good idea to switch to a 0w-20 full synthetic? If so, should I use the Genuine Toyota Oil? Would any full synthetic be the same?
     
  17. wjtracy

    wjtracy Senior Member

    Joined:
    Sep 19, 2006
    10,888
    3,369
    1
    Location:
    Northern VA (NoVA)
    Vehicle:
    2006 Prius
    For Gen2 USA the preference is 5W-30 or 0W-30.
    You don't have to switch to synthetic on a Gen2, that's my preference.
    The Genuine Toyota generally gets very good marks for quality.
    I use Mobil-1 easy to get from Walmart, but other quality brands out there.
    Mobil-1 does have a high mileage version to try to minimze oil loss if that is an issue.

    If switching from dino to synthetic, I don't really see a big issue. If you look at Mobil1 web site, I think they say you can just make the switch. Some people remember when the first synthetics were a little harder to swtich over to. I do not think we have that problem anymore, but you could check a couple website to be sure (Mobil1 etc).
     
  18. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,143
    6,180
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    I would not use 0W-20 in the Utah summer. Maybe in the winter season.
     
Loading...