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

Mobil1 0W20 Oil analysis reports

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by TheForce, Jul 27, 2007.

Page 3 of 3
  1. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    The fuel residual is up, but the TBN is still quite good. You can try increasing the interval in 2,000-3,000 increments until you start seeing a dip in TBN and/or an increase in wear metals

    Yes
     
    #41 jayman, Oct 22, 2009
    1 person likes this.
  2. TheForce

    TheForce Stop War! Lets Rave! Make Love!

    Joined:
    May 30, 2005
    3,461
    537
    0
    Location:
    Wheelersburg, Ohio
    Vehicle:
    2006 Prius
    Model:
    N/A
    Must be because the numbers are pretty close since the first oil change.

    [edit] did not see jayman's post about the additive.
     
    #42 TheForce, Oct 22, 2009
    1 person likes this.
  3. blueumbrella

    blueumbrella Member of Prius Regeneration

    Joined:
    May 24, 2009
    294
    34
    0
    Location:
    Seattle
    Vehicle:
    2009 Prius
    Model:
    N/A
    It appears you are doing a fine job getting your minerals, but need to work on getting
    more vitamin C and D - :)
     
    #43 blueumbrella, Oct 24, 2009
  4. TheForce

    TheForce Stop War! Lets Rave! Make Love!

    Joined:
    May 30, 2005
    3,461
    537
    0
    Location:
    Wheelersburg, Ohio
    Vehicle:
    2006 Prius
    Model:
    N/A
    Just got my analysis today. This is the Third oil change using my Hymotion battery. I ran for 10k miles this time. Estimated time on engine ~3k miles. The rest was all electric. :D

    MI/HR on Oil 9,998
    MI/HR on Unit 50,042
    Sample Date 11/02/06

    ALUMINUM 12
    CHROMIUM 0
    IRON 10
    COPPER 4
    LEAD 5
    TIN 0
    MOLYBDENUM 79
    NICKEL 0
    MANGANESE 1
    SILVER 0
    TITANIUM 0
    POTASSIUM 2
    BORON 54
    SILICON 19
    SODIUM 8
    CALCIUM 1566
    MAGNESIUM 10
    PHOSPHORUS 544
    ZINC 541
    BARIUM 0


    SUS Viscosity @ 210°F 44.0
    cSt Viscosity @ 100°C 5.7
    Flashpoint in °F 210
    Fuel % 8.8
    Antifreeze % 0
    Water % TR
    Insolubles % 0.5
    TBN 4.0



    I'm guessing that my high fuel content is because I really never let the engine get hot enough to burn out the gas. I dont think I have a fuel system problem. I'll have to figure out a way to get the engine hot once a week or so to get that fuel out of the oil. I'm going back to 5k miles this next oil change.

    To those that are running extended EV mode with their plug in you may want to make sure to get the engine hot for a while so you have less fuel in the oil.
     
    #44 TheForce, Feb 11, 2011
  5. SageBrush

    SageBrush Senior Member

    Joined:
    Jun 4, 2008
    11,627
    2,531
    8
    Location:
    Southwest Colorado
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    Pretty sharp of the oil analysis guys to consider inadequate engine heat as the reason for dilution.
     
    #45 SageBrush, Feb 11, 2011
  6. TheForce

    TheForce Stop War! Lets Rave! Make Love!

    Joined:
    May 30, 2005
    3,461
    537
    0
    Location:
    Wheelersburg, Ohio
    Vehicle:
    2006 Prius
    Model:
    N/A
    Well I did mention in my first oil analysis when I converted my car that I converted it to a PHEV. Also for the last three reports I listed an estimated engine run time on the total miles on oil since I do a lot of EV driving.
     
    #46 TheForce, Feb 11, 2011
  7. Bill60546

    Bill60546 Member

    Joined:
    Mar 25, 2004
    388
    4
    0
    Location:
    Chicago
    Vehicle:
    2004 Prius
    Model:
    N/A
    I own a 04 with 70K miles. Does anyone see any issues with changing to synthetic oil at this time? Brand?
    Many thanks!
     
    #47 Bill60546, Feb 14, 2011
  8. 2009Prius

    2009Prius A Wimpy DIYer

    Joined:
    Mar 25, 2009
    2,705
    510
    63
    Location:
    USA
    Vehicle:
    2009 Prius
    Some owners saw increased oil consumption after switching to synthetic at high mileage. You have to weigh that risk against the potential benefit (if any). If I were you I won't bother. Just my 2 cents.
     
    #48 2009Prius, Feb 14, 2011
  9. seilerts

    seilerts Battery Curmudgeon

    Joined:
    Mar 7, 2010
    3,326
    1,513
    38
    Location:
    Santa Fe, NM
    Vehicle:
    2005 Prius
    Not many choices out there for 0w20. Mobil 1, Valvoline, Castrol, Honda, Toyota, AMSOil, Redline. None are cheap, but you ought to have a longer oil change interval as long as you don't have a consumption problem (not common).
     
    #49 seilerts, Feb 15, 2011
  10. CBarr31

    CBarr31 Active Member

    Joined:
    Sep 12, 2007
    434
    225
    0
    Location:
    Charlotte, NC
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    Bill,

    I asked that same question awhile back in the thread listed below and the consensus was the benefits would be negligible at best and the problems could be considerable.

    I hope this helps.

    http://priuschat.com/forums/gen-ii-...igh-mileage-switch-synthetic-any-benefit.html

    Happy driving,
    Chris
     
    #50 CBarr31, Feb 16, 2011
  11. TheForce

    TheForce Stop War! Lets Rave! Make Love!

    Joined:
    May 30, 2005
    3,461
    537
    0
    Location:
    Wheelersburg, Ohio
    Vehicle:
    2006 Prius
    Model:
    N/A
    New oil analysis today. I tried running the engine more this time. Fuel dilution is down but still high. I'm going for another 5k miles this time around.

    MI/HR on Oil 5,040
    MI/HR on Unit 55,082
    Sample Date 11/10/29

    ALUMINUM 5
    CHROMIUM 0
    IRON 6
    COPPER 2
    LEAD 0
    TIN 1
    MOLYBDENUM 97
    NICKEL 0
    MANGANESE 0
    SILVER 0
    TITANIUM 0
    POTASSIUM 0
    BORON 60
    SILICON 20
    SODIUM 6
    CALCIUM 2349
    MAGNESIUM 13
    PHOSPHORUS 700
    ZINC 782
    BARIUM 0


    SUS Viscosity @ 210°F 51.1
    cSt Viscosity @ 100°C 7.6
    Flashpoint in °F 300
    Fuel % 4.3
    Antifreeze % 0
    Water % 0.0
    Insolubles % 0.3
    TBN 5.6
     
    #51 TheForce, Nov 4, 2011
    1 person likes this.
  12. wjtracy

    wjtracy Senior Member

    Joined:
    Sep 19, 2006
    11,340
    3,596
    1
    Location:
    Northern VA (NoVA)
    Vehicle:
    Other Hybrid
    Model:
    N/A
    I am due for an oil change. Do we have a "sticky" on recommended synthetic oil types for Gen-II? I am still using 5W-30 Mobil-1. I see the 0W-20 is longer lasting oil (now used in new Prii). But I have use up my 5W-30 supply anyway. 0W-20 has winter MPG benefit (+? MPG) but in hot summer may be concern? I have 97K miles on an 2006.
     
    #52 wjtracy, Nov 6, 2011
  13. xs650

    xs650 Senior Member

    Joined:
    Jul 2, 2010
    4,539
    1,433
    9
    Location:
    Northern California
    Vehicle:
    2010 Prius
    Model:
    II
    0W-20 isn't a longer lasting oil, Toyota give the change interval distances on the GenIII to encourage you to use 0W-20. They have to because the used 0W-20 for their gumnt fuel economy tests.

    How long an oil lasts is much more a function of the oil's quality than it's viscosity.

    Odds are there is no problem using 0W-20 in a Gen II during the summer, but you are wise to be suspicious until you have solid evidence that it's OK.
     
    #53 xs650, Nov 6, 2011
  14. wjtracy

    wjtracy Senior Member

    Joined:
    Sep 19, 2006
    11,340
    3,596
    1
    Location:
    Northern VA (NoVA)
    Vehicle:
    Other Hybrid
    Model:
    N/A
    OK XS, I am going with 0w-30 advanced fuel economy Mobil-1. Pretty sure that is suggested as valid replacement for Prius Gen II.
    That should be good compromise.
     
    #54 wjtracy, Nov 6, 2011
(You must log in or sign up to post here.)
Page 3 of 3