Another oil burning Prius :(

Discussion in 'Prius v Main Forum' started by Aaron Vitolins, Jun 9, 2017.

  1. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Hey everyone, my lovely over maintained Prius has started to slowly use oil.

    I purchased my Prius with 82,000 miles, now over 111,000 miles. Oil changed every 5k miles with high quality synthetic oil. Changed by my own two hands, oil checked at minimum twice a week.

    At around 100k it started. It's still slow, at about half a qt at 2.5k miles. So not bad.. but that's one car problem I really don't like. If something broke I can fix it my self... but oil burning?? No. when they consume oil that means more problems down the line, and it makes me nervous. Adding oil is no big deal, but I've always been so cautious of this, so I alway treated it so well hoping this wouldn't happen.

    My sisters 2010 with 170 miles (before engine replacement) used at minimum 1 qt every 1.5k miles. Then the head gasket blew!

    I always let the engine fire up in the morning and run for 10 seconds before I even pull away. I wanted to keep this engine perfect! Unfortunately all that was for nothing. I am disappointed in my Prius. I LOVE this car but I'm kinda sad about this Prius issue :-(

    I am going to try replacing the PCV valve at the next oil change, hope that is the problem. Fingers crossed!!
     
  2. JC91006

    JC91006 Senior Member

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    Good plan on pcv valve
     
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  3. rjparker

    rjparker Senior Member

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    Let us know how or if the pcv helps
     
  4. Aaron Vitolins

    Aaron Vitolins Senior Member

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    I will. I think it might be gummed up. Although not really related, I cleaned the EGR pipe and it was nasty at 100k
     

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  5. bisco

    bisco cookie crumbler

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    what year and model?
     
  6. Aaron Vitolins

    Aaron Vitolins Senior Member

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    It's a 2012 v wagon. Love the room, fuel economy (45 mpg) and the reliable hybrid components. The engine worries me a bit. It has a exhaust manifold rattle on slow acceleration as well.
     
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  7. bisco

    bisco cookie crumbler

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    maybe just a heat shield needing attention?
     
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  8. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Possibly! I checked all the heat shields underneath the card and didn't find anything. It's about 8k miles away from needed spark plugs, so when I take the wiper cowl off I will have access to the rear of the engine. Who knows, maybe even new spark plugs them self would solve the rattle by making the engine run smoother?

    Mainly sad that it's started consuming oil under my very watchful eye. It wouldn't be as of a big deal to me if it already used some oil. It's just that since I've had the car, and I've done everything I could to keep it like new.
     
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  9. sillymike

    sillymike Junior Member

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    I had the exact same problem I changed the PCV valve and it did not change a single thing on the oil consumption.

    Posted via the PriusChat mobile app.
     
  10. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Damn.. what generation Prius? I know that the 2nd generation PCV valve replacement didn't help
     
  11. eman08

    eman08 Active Member

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    Appears to be the norm with all priuses as they age. I loose a quart every 1,500 miles with 175k miles on my 09 Prius. I've yet gotten around to check the PCV value. I just top the oil off in between oil changes. Your lifters would tick like mad when low on oil since the VVTi replies on oil.

    Posted via the PriusChat mobile app.
     
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  12. Sam Spade

    Sam Spade Senior Member

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    The advice is the same for you as for everybody else who has a bit of oil usage:
    On the next oil change, use a slightly higher weight of oil that is labeled for "high mileage" cars.
    This might slow down the progression but you can't UNDO wear on engine parts.

    At one quart per 5 thousand miles you really don't even have a problem yet.
     
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  13. Aaron Vitolins

    Aaron Vitolins Senior Member

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    I've noticed that the Honda Insight 2010-2011,(2012 insight had a piston ring problem) and the Ford Escape hybrids don't use any oil even with high miles. They are both have one thing in common.. they aren't Atkinson cycle engines. My engine shouldn't have wear at 110,000 miles. Something isn't right in the engines. I think it might be something to do with the Atkinson cycle, or the Energy saving piston rings.

    If you think about it, us old Prius drivers are putting OIL into the air? How is this green? That's just dirty! Even if it is a small amount of oil. I think it should bother Toyota that their hybrids burn oil!
     
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  14. sillymike

    sillymike Junior Member

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    Gen 3 2010 prius 2. Same engine.

    Posted via the PriusChat mobile app.
     
  15. Raytheeagle

    Raytheeagle Senior Member

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    This is about where I started to see oil consumption in our 2010 Prius II (now at 156 k miles and going strong:)).

    The good thing is it sounds like you caught this by checking the dipstick and not from a dash light;).

    For now, I would top up til the next oil change, then try the following:

    • Engine flush (I use BG Products EPR every oil change before I change the oil)
    • Run some fuel system cleaner prior to the oil change (I use the BG Products 44K)
    • Switch to 5W-30 synthetic oil (I have used this for over 35k miles since I began to notice the oil consumption and have not seen a drop in mpg)
    Depending on the last time you drained the engine coolant (100 k miles) and knowing that you have a spare egr cooler now (thanks to the engine swap;)), I might add to the above a egr through intake manifold cleanse. It sounds like the egr pipe was dirty, so other components will be in similar situations :(.

    Hope that helps(y).

    On a side note, do you still have your sisters old engine? If so (and you have the time), I would be curious in the following info knowing the blown head gasket situation:
    • Current state of egr cooler
    • Current state of intake manifold
    • Impeller on water pump state
    Thanks in advance if you get to any of these items (y).
     
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  16. Sam Spade

    Sam Spade Senior Member

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    At 110,000 miles, an engine that does NOT use any oil is the exception and not the rule.

    How much can be debated, maybe, but wear is wear and can't be completely eliminated.
     
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  17. Sam Spade

    Sam Spade Senior Member

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    IF.....that means pouring some solvents into the oil, that is a BAD idea........even once.
    There is no good reason to do that.
     
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  18. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Hey! Last oil change I actually used BG EPR. No such luck, it's only gotten worse since than.

    Maybe tomorrow I can tinker with the old engine. We might actually rebuild that engine eventually. Maybe put it in my Prius v when the engine blows... I will for sure change engine oil weight next oil change.
     
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  19. Raytheeagle

    Raytheeagle Senior Member

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    Sorry to hear that:(.

    Doing an oil change on the wife's 98 4runner with 262 k miles and still going strong:)!

    It gets the EPR then MOA. No oil consumption, just a valve cover gasket leak. Fixed it once, and it has returned :(.

    Keep us posted on the tinkering (y).
     
  20. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Glad to hear! I'm tempted to use the EPR on my others sisters 2005 with 310,000 miles. That car uses lots of oil but it's never had anything but the water pump and spark plugs mechanical wise. Runs great and still has great acceleration at its old age.
     
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