How long can one delay a synthetic oil change past 6 months?

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by chinarut, Dec 30, 2020.

Tags:
  1. TinyTim

    TinyTim Active Member

    Joined:
    Nov 23, 2016
    331
    208
    0
    Location:
    Seattle
    Vehicle:
    2017 Prius
    Model:
    Two
    I just had my oil changed yesterday. I think it went 18 months between oil changes. 9600 miles between changes. I highly suggest a battery tender for any hybrid. My 12V is testing good now. Before I got the tender it was moderate. I use the tender once a month.
     
    Ozark Man likes this.
  2. DavidA

    DavidA Prius owner since July 2009

    Joined:
    Jul 14, 2009
    2,229
    1,735
    18
    Location:
    Chicago western burbs
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    My synth oil was changed in May of 2019, and then again in June 2021. Everything was fine. That said, and because of COVID and two mised driving vacations, the car had less than 5,000 miles driven between the two. YMMV.
     
  3. thomassster

    thomassster Member

    Joined:
    Nov 2, 2015
    164
    54
    0
    Location:
    Colorado, US
    Vehicle:
    2019 Prius
    Model:
    XLE AWD-e
    it really depends on how tip-top shape you want to maintain your Prius and whether you plan on keeping it for an extended time. The longer you leave oil in the engine, the more it may build up. If you change the oil once a year, you may accumulate a tiny amount of buildup which you won't notice a difference first many years. But over time, probably about 10-15 years, things will accumulate, you'll probably notice differences in your engine, possibly burning oil then. For someone who plans to keep their car probably 5-10 years probably won't care much and your car will be fine. But for those who are hoping for the long run 10+ years, then you may want to consider changing more often.
     
  4. brenthon

    brenthon Junior Member

    Joined:
    Jun 1, 2021
    40
    5
    0
    Location:
    GA
    Vehicle:
    2015 Prius
    Model:
    N/A
    With those low miles, I would not worry much.
     
  5. MIkeDr

    MIkeDr Member

    Joined:
    Sep 16, 2020
    129
    80
    0
    Location:
    Seattle, WA
    Vehicle:
    2020 Prius
    Model:
    XLE AWD-e
    Here’s something I recall from 20 years ago. BMW said not to change your oil until the car said it was time, which was mileage-based weighted by monitored driving conditions. I don’t recall the specifics, but the baseline was, say, 10,000 miles, which could change to 5 or 15k miles at the margins.

    However, the problem wasn’t the oil. It turned out that the oil filters disintegrated in some cases between 2-4 years. Costly warranty repair. After that BMW said the longest you should go was 12 months.

    We’re putting on 2,500 miles a year on our Prius. I’m doing 6 month service intervals right now because it’s on Toyota’s dime still. Afterwards will go to annual changes.
     
  6. OptimusPriustus

    OptimusPriustus Junior Member

    Joined:
    Jul 31, 2021
    31
    12
    1
    Location:
    Finland
    Vehicle:
    2010 Prius
    Model:
    N/A
    In the old days Toyota minimized plastic waste and emissions in Prius manufacturing. True pioneer. 6months oil change interval is horribly far from that. Used engine oil goes to rycycling of course but still. I honestly think that 6months interval has more to do with getting the cars to shop and minimizing overall field failure rates rather than longetivity of engine. All at the cost of customer and..nature
     
    bisco likes this.
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    94,168
    42,685
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    dealers have a lot of control. ford and gm are overwhelmed with anti ev dealers due to lack of maintenance revenue
     
  8. OptimusPriustus

    OptimusPriustus Junior Member

    Joined:
    Jul 31, 2021
    31
    12
    1
    Location:
    Finland
    Vehicle:
    2010 Prius
    Model:
    N/A
    Yes, the more cars visit shop the less field failures and reliability ranking keep on shining:) And it’s good money too. About a quarter of automotive industry profits used to come from aftersales. EV’s are changing that dramatically
     
Loading...