Page 2 of 2 FirstFirst 12
Results 11 to 15 of 15
  1. #11
    Join Date
    Feb 2013
    Location
    Boston, MA
    Posts
    1,174

    Default

    Quote Originally Posted by pbierre View Post
    vti, what can you say about how to prevent a burnt exhaust valve? Do the "high mileage" engine oils give any protection?

    Is it your viewpoint that an engine that consumes minimal oil (< 1 quart / 7500 miles) at 100,000 mi. is enduring minimal wear? Do you know what is the rate of oil consumption coming off the factory floor?

    Is anyone set up to analyze spent oil for micro-metallic content, as a way to assess surface wear?
    Prevent? Rebuild the engine once it starts consuming more than 250 ml / 1k mile. My was eating 600 ml / 1k of 10w40 shortly before its death.

    At least the valve stem caps have to be replaced. But by 200k piston rings are bad already: oil rings are worn and stuck, at least partially. Compression rings as well.

    To prolong engine life on its last stretch you have to switch to a low SAPS oil. Otherwise be ready to see this:



    Was using Red Line exclusively for the past couple of years. Switched to Mobil 1 0w40 European Car Formula, because my mild rebuild will be good maybe for the next 100-150k miles
    2002 V70 (sold)
    2005 XC70 (Telos Road took it. Did a chassis swap)
    2016 XC60

  2. #12
    Join Date
    Feb 2010
    Location
    Virginia Beach
    Posts
    3,975

    Default

    Are the deposits from high SAPS? Or the increased calcium? I think I would have to do a very detailed brand/additive comparison before condemning an A3/B4 oil on the basis of SAPS.

    I’ll keep you all posted on this, as the XC just rolled over 266,000 miles on the original engine. It’s been drinking about 1 quart (liter) every 1,500-2,000 miles for the last several years. Compression and performance are still good.

    I’ll take a look when I change the plugs 4,000 miles from now.

    But I just committed to keeping the car for a while with an entire suspension rebuild, spring replacement and timing belt.
    Current Fleet:
    2016 Tundra Crewmax 4WD 1794
    2005 MB S600 (100K, Michelin AS3+, M1 0W40)
    2002 V70-XC (258K, Castrol Edge 0W40)
    2002 V70-T5 (208K, IPD bars, Bilsteins)
    2001 V70-T5 (92K)
    1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)

  3. #13
    Join Date
    Feb 2013
    Location
    Boston, MA
    Posts
    1,174

    Default

    You may still want to pull the valve cover and do the valve stem caps. Must be a total PIA on exhaust side, with the head still attached to the block. I would detach the downpipe and tilt the engine/subframe towards bumper for a better angle and clearance.
    2002 V70 (sold)
    2005 XC70 (Telos Road took it. Did a chassis swap)
    2016 XC60

  4. #14
    Join Date
    Jul 2012
    Location
    Landenberg, PA
    Posts
    247

    Default

    Quote Originally Posted by Astro14 View Post
    Are the deposits from high SAPS? Or the increased calcium? I think I would have to do a very detailed brand/additive comparison before condemning an A3/B4 oil on the basis of SAPS.

    I’ll keep you all posted on this, as the XC just rolled over 266,000 miles on the original engine. It’s been drinking about 1 quart (liter) every 1,500-2,000 miles for the last several years. Compression and performance are still good.
    I'm coming up on 200K miles Astro and have similar oil consumption to you. I change oil every 5K with Penzoil Platinum or Castrol Euro 5W/30 and the performance seems the same as it did 10 years ago (good). So where does the oil go?


    2005 XC70 - 50/35 Tint, Yakima Rack

  5. #15
    Join Date
    Feb 2013
    Location
    Boston, MA
    Posts
    1,174

    Default

    Quote Originally Posted by perkinscl View Post
    I'm coming up on 200K miles Astro and have similar oil consumption to you. I change oil every 5K with Penzoil Platinum or Castrol Euro 5W/30 and the performance seems the same as it did 10 years ago (good). So where does the oil go?
    Multiple sources:

    1. Worn valve stem caps - allow oil to drip down. Oily smoke upon engine start in the morning - this is it.
    2. Worn piston oil rings - does not scrape cylinder walls good enough.
    3. Worn compression rings - allow by-pass gases in crankcase, that creates a lot of oil mist that has to be evacuated to the intake via PCV
    4. Worn turbo - throws oil into intake

    As a super-duper motor expert who took apart tremendous amount of 5 cylinder engines (two ), I would say: at 200k miles this engine needs at least new valve stem caps and the piston rings. Main and rod bearings and turbo can still be good unless engine was fully neglected, but the rings and caps are a wear item.
    2002 V70 (sold)
    2005 XC70 (Telos Road took it. Did a chassis swap)
    2016 XC60

Page 2 of 2 FirstFirst 12

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •