Another oil burning Prius :(

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

  1. Sam Spade

    Sam Spade Senior Member

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    Maybe you should buy a lottery ticket or two.

    Over the course of those years, several (a lot really I think)models have come out that used oil from the day they were new.

    And.......are you telling me that those 5 vehicles all used absolutely NO oil between recommended changes.......which should have been extended from 3K miles to the currrent 7K miles or more......or are you saying that they just didn't use enough so that you had to add between changes ?? I might easily believe that IF you have kept a 3K change interval over all those years.
     
  2. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

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    My last 5 cars burned exactly zero quarts of oil in between scheduled intervals.
     
  3. Rustyfender

    Rustyfender New Member

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  4. bat4255

    bat4255 2017 Prius v #2 and 2008 Gen II #2

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    Cheap and clean.
     
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  5. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Is it consuming, how much?
     
  6. Aaron Vitolins

    Aaron Vitolins Senior Member

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    I'd run a fully synthetic 5w30 in that puppy
     
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  7. Sam Spade

    Sam Spade Senior Member

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    The kind that comes in gallon jugs that you can keep in the trunk. :D

    Unless it is using a lot of oil between changes, you "should" use whatever kind of oil that you please.
    Whatever was originally recommended would be good. See the oil fill cap.
     
  8. Norcal2

    Norcal2 Junior Member

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    For those with excessive oil usage..did you ever do a leakdown test and compression test? If so what were the readings? In my experience these will show leaking rings, valves etc way ahead of when it actually becomes problematic. Im going to have my car done before the warranty is up just to make sure...
     
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  9. Offline

    Offline Active Member

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    Yes, the oil level never dropped below the full mark on the dipstick between oil and filter changes on the five vehicles.

    I used regular motor oil in the older two vehicles which had four cylinder engines: 1979 Mercedes 240D (diesel) and an 1986 Honda Accord. Oil and filter change intervals on those were 3,000 miles. I knew their history since both were purchased new. I was surprised that the 240D didn't use oil since previous Mercedes I had used quite a lot as if they were designed to. The earlier Mercedes held a lot of oil and I remember the difference between the full and add mark on the dipstick of one was around 2 quarts with a total oil capacity of about 8 quarts.

    The three later vehicles were all Toyota products: One Camry V6 and two Lexus LS V8 sedans. 5,000 mile oil and filter changes on those three. The Camry V6 never saw anything except Mobil 1 synthetic - it's now being driven by a nephew and is at over 200,000 miles. I used regular oil in the first Lexus for its first 40,000 or so miles since Toyota did not sanction the use of synthetic oil in the early 1990's - then it was Mobil 1 synthetic only until I sold the car to a friend at 183,000 miles. He drove that Lexus to 300,000 miles before he sold it.

    I don't know what type of oil was used for the first 3 years/36,000 miles in the second Lexus but it was always serviced at a Lexus dealer. I used only Mobil 1 from 36,000 miles until I sold it at 180,000 miles. It also never used a drop of oil between 5,000 mile changes.

    I doubt if we've been just "lucky". I think it is more likely that it has been because I've done all of the oil changes and most of the maintenance myself and have always met or exceeded maintenance requirements. Now that I've mostly "retired" from doing vehicle maintenance due to my age, I pay a lot of attention to the maintenance and repair work I pay others to do.

    I especially pay attention to the oil level in the Prius based on what I've read about the dangers of overfilling Atkinson cycle engines. After the nearby Toyota dealer once overfilled the Prius engine by about 1/2 quart of oil during an oil change, I had them remove the excess oil.
     
  10. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

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    Yes Sam. Maintained the 5 vehicles with 5k oil changes but never added any oil in between. In fact that reminds me I have several half used cans/bottles of oil just sitting around from olden times that I need to recycle. Only thing I need oil for is a yearly in my lawn mower.
     
  11. Aaron Vitolins

    Aaron Vitolins Senior Member

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    This past weekend I changed the spark plugs, and the oil. I switched to 5w30 fully synthetic. Didn't have the right fitting to remove the PCV valve unfortunately
     
  12. Aaron Vitolins

    Aaron Vitolins Senior Member

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    I will update on oil consumption with this new oil weight.
     
  13. Sam Spade

    Sam Spade Senior Member

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    There are some things that can cause oil usage that will NOT show up on those tests: Valve guide seals just for instance.

    And that is a lot of $$$ to be spending on an engine that is not showing symptoms, just out of "curiosity".
     
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  14. Sam Spade

    Sam Spade Senior Member

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    YOU did not initially make the "5 vehicles" claim and my question was not directed towards YOU.

    Although your response was interesting.
     
  15. That_Prius_Car

    That_Prius_Car Austin Kinser

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    Don't forget to keep us updated on oil consumption!
     
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  16. Got2bHam

    Got2bHam Member

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    Oil consumption doesn't mean it's a bad engine. Honestly half a quart at 100k isn't bad. It might be a number of things but for the most part nothing serious. I'd just check it regularly and keep adding. Also, you might try a high mileage oil. I know there's not much difference but synthetic oils are usually very thin that might lessen the usage.
     
  17. Norcal2

    Norcal2 Junior Member

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    A leakdown test shows the sealing ability of the combustion chamber IE Piston and rings to cylinder wall, Valve faces to the valve seats and head gasket seal.
    If you have leakage into the breather the piston and rings are suspect.
    If there is leakage into the cooling system or where the head meets the block the head gasket or head or block is suspect.

    With a worn out guide the valve will more than likely contact the seat on the side opposite of the pressure from the rocker or cam lobe. this will create extra wear to the seat and valve face. When the pressure is off the valve the spring may pull the valve back to center on the seat. The leakdown test will show the leakage at the valve to seat junction requiring attention.

    They don't cost that much and id rather find out before my warranty runs out, ive had a lot of these done as part of a Pre inspection and pre sale of my vehicles..


     
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  18. Aaron Vitolins

    Aaron Vitolins Senior Member

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    That's good to know, and savvy way to buy a used car. I am still keeping a close eye on my oil dipstick. I've gone about 500 miles and haven't seen any drop in the oil yet. Too early to tell.
     
  19. Norcal2

    Norcal2 Junior Member

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    Yes I always do for my( PPI) pre purchase inspection..and when selling provide the same back...glad to hear your oil use is holding stable
     
  20. Sevreth

    Sevreth New Member

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    My wife's 07 Prius has had that same rattle for over 50k miles haha. I have looked everywhere and cannot find what rattles but doesn't seem to be a problem.

    It also consumes about 1 qt or so every 5k miles. We keep tabs on it and just add as needed. I will look into the PCV replacement to see if that helps.
     
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