Crown

Board: Porsche - 911 - 997 - Turbo Language: English Region: Worldwide Share/Save/Bookmark Close

Forum - Thread


    Oil consumption question

    I now have 1,500 miles on my 2008 TT, and the oil level has not dropped even one segment yet. I have driven it fairly hard during break-in, at speeds up to 150 mph. My 2006 C2S burned a qt in the first 1,000 miles, then stabilized. It seems my turbo is not burning any oil, or the oil level measuring system is tango uniform. What are other people's experiences?

    Dick


    Re: Oil consumption question

    I just added a half quart to mine at 2400 miles.

    Re: Oil consumption question

    Dick, You're not driving it hard enough!

    Re: Oil consumption question

    Quote:
    Over the Hill said:
    Dick, You're not driving it hard enough!



    you beat me to it.
    Dick, I have averaged 1 quart/2500 miles over the last 23k miles. consumption was higher early on, then decreased significantly.

    Re: Oil consumption question

    Mine just turned 1000 miles and I have not added anything yet, it came down one bar and since the car is 6 months old and was already at the shop for the exhaust + plenum I had the oil service done too (yesterday). The harder your drive the more oil you will lose, that's the nature of dry sump engine

    Re: Oil consumption question

    I've heard of lots of guys having the same "problem" of "zero" oil consumption. Makes me think an [expletive] at the dealer put too much oil in at delivery. Do our guages indicate when an engine is overfilled?

    I they do, then maybe there's excess oil in there but probably just short of triggering the guage to indicate overfilled.


    BTW, FWIW, I read a TSB which says you are allowed to burn up to 1.6 QUARTS per 622 miles. (one point six quarts per six hundered twenty two miles)!!!

    Re: Oil consumption question

    oil consumption in new turbo is based on seating the rings. the sooner you can run full boost you will see oil use reduce. obviously if you hammer the car alot you will use more oil then most, even after the rings seat/break in period.

    Re: Oil consumption question

    MY08 Turbo - almost zero oil consumption over first 2000 miles.

    MY05 Carrera S Cab - DRANK oil almost as fast as petrol!! Almost 1L every 1500 miles!

    Both using the same driver, driven the same way.

    Re: Oil consumption question

    Don't forget...the engines are very different. The TT is a different crankcase and a "real" dry sump system.

    Re: Oil consumption question

    I wish I knew for sure instead of just guessing: it seems to me possible that many trips with lots of _cold_ _starts_ would burn significantly more oil than a few long trips. So it depends on _how_ you accumulate miles.

    Re: Oil consumption question

    It's a function of how they built your engine. I have seen many Porsche drivers reporting varying oil consumption in their various Porsches and assuming the driver is a constant, something's afoot. It's probably a problem with valve guides for those who use a lot of oil.

    Dan

    Re: Oil consumption question

    I have over 28,000 kilometers on mine and although I change my oil every 6-7000 kilometers I have needed to add very little. Nothing like my 993 C4S which used a quart every 1600 kilometers or so.

    Re: Oil consumption question

    Quote:
    Dan L said:
    It's a function of how they built your engine.



    Interesting... . You mean like manufacturing variations?

    Like maybe Porsche has a 100 pistons hot off the machine tools.

    Then group them together in sets of six where each unit is closest to each other unit in the set and all within tolerance. Those go in the same engine.

    Another set of six is _different_, but since they are "mated with matching pistons THEY go in the same but different engine.

    If you took six pistons at random that were within tolerance but not _matched_ to each other maybe THAT would probably be a bad engine.

    So something like this this "matching" of sets could explain the oil consumption differences in perfectly good engines.

    Again, just my amateur guess. (no time to fact find).

    Anybody know? Why is there suuuuuch a huge range of oil consumption rates in otherwise perfectly good engines?

    Why would Porsche tolerate an obscene amount of oil to be burned (up to 1.6 liters per 1000km)?


    Oh, could be any parts, not just pistons.



    Re: Oil consumption question

    Take a look on the 997 forum in Rennlist and search for the oil consumption poll. Over 70% of the owners report little to no oil use,--period. There are only about 2 places where oil consumption can happen in an engine. (1) The cylinder walls against the piston rings and (2) the valve guides. For example, my cylinder walls were inspected with a borescope and found to be normal, but I consume a quart of oil every 1000 miles. This is by far the worst Porsche oil performance I have ever experienced,--and I have driven and broken in my engines the same way every time. I'm a constant,--the Porsche engine mechanic is not.

    Dan

    Re: Oil consumption question

    BTW, you guys have seen this TSB, right?

    Read bottom line (permissible max oil consumption) and be amazed.

    Re: Oil consumption question

    Quote:
    MMD said:
    BTW, you guys have seen this TSB, right?

    Read bottom line (permissible max oil consumption) and be amazed.



    Yeah, but that's for the two-stroke Porsche engines isn't it?

    Re: Oil consumption question

    Quote:
    JoeRockhead said:
    Quote:
    MMD said:
    BTW, you guys have seen this TSB, right?

    Read bottom line (permissible max oil consumption) and be amazed.



    Yeah, but that's for the two-stroke Porsche engines isn't it?



    Absolutely!

    Re: Oil consumption question

    Quote:
    JoeRockhead said:
    Quote:
    MMD said:
    BTW, you guys have seen this TSB, right?

    Read bottom line (permissible max oil consumption) and be amazed.



    Yeah, but that's for the two-stroke Porsche engines isn't it?



    Haha. Probably. Hummmm..., and I never thought to check if the Chevron gas I use had oil mixed in it.

    The other thing might have to do with definition of consumption:

    For Porsche's it includes the amount of oil leaked as well as the amount burned.


    Re: Oil consumption question

    My turbo guzzles oil.

     
    Edit

    Forum

    Board Subject Last post Rating Views Replies
    Porsche Sticky OFFICIAL: New 991.2 GT3 (2017) 11/18/18 10:43 PM
    EnglishManInNY
    403344 5190
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA 11/17/18 12:03 AM
    Pilot
    320435 1966
    Porsche Sticky 992 (Next 911 generation 2019/2020) 11/19/18 5:34 AM
    dxpetrov
    270682 2969
    Porsche Sticky The moment I've been waiting for... 11/7/18 2:43 PM
    Pilot
     
     
     
     
     
    211273 1077
    Porsche Sticky OFFICIAL: 911 GT2 RS (2017) 11/15/18 6:23 PM
    BONES
    191293 2674
    Porsche Sticky OFFICIAL: 991.2 GT3 RS (2018) 11/18/18 8:30 PM
    SciFrog
    122381 2413
    AMG Sticky Mercedes E63 S AMG (2018) - Short Review (updated on a regular basis) 11/15/18 12:15 PM
    RCA
    32197 316
    Porsche Sticky Paint protection film 9/25/18 6:14 PM
    throt
    14035 121
    Porsche Sticky Child seats in a 991 6/18/18 8:51 PM
    Monkey
    13316 31
    Porsche 991 GT3 RS 1/9/18 1:43 PM
    Kimi
    523132 5816
    Porsche OFFICIAL: 991 Turbo and Turbo S 4/3/18 9:15 AM
    KresoF1
    483290 4254
    Porsche OFFICIAL: 911 R (2016) 9/13/18 10:12 AM
    RCA
    278802 2589
    Porsche Cayman GT4 11/16/18 11:30 AM
    RCA
    263864 2611
    Porsche OFFICIAL: New 991.2 Turbo and Turbo S 1/23/18 12:27 AM
    RCA
    191503 1074
    Ferrari 488 GTB/GTS 11/19/18 7:19 AM
    koko
    189539 1742
    McLaren McLaren on a winning streak 10/29/18 5:13 PM
    reginos
    178762 3212
    Porsche Boxster Spyder (981) 8/31/18 10:25 AM
    WAY
    142722 757
    Others Audi R8 V10 Plus (2016 model) - Review (updated Feb 13th 2017) 11/1/18 6:13 PM
    Boxster Coupe GTS
    141975 2234
    Porsche OFFICIAL: New Panamera (2016) 1/6/18 10:41 PM
    Wonderbar
    128248 1284
    Ferrari Ferrari F12 Berlinetta / 599 GTO Successor 5/22/18 9:16 PM
    RCA
    111617 789
    Others VW caught cheating emissions tests 5/3/18 7:52 PM
    CGX car nut
    106498 871
    Porsche Porsche Mission E - the future of Porsche? 11/18/18 7:48 PM
    ISUK
    84539 1128
    Porsche Donor vehicle for Singer Vehicle Design 10/13/18 9:50 PM
    RCA
    66618 672
    Porsche UPDATES: 2018 Porsche Cayenne 2/6/18 2:13 PM
    RCA
    57184 423
    Porsche OFFICIAL: New 991.2 Carrera GTS models 11/3/18 11:09 AM
    bluelines
    46652 477
    Others Tesla Roadster 11/14/18 12:48 PM
    lukestern
    43178 1395
    Others Tesla Model X Thread Closed 2/23/18 3:41 PM
    RCA
    42812 1122
    AMG AMG GT R 1/26/18 7:19 AM
    GoHardGT3RS
    41248 597
    Lambo Aventador and SV 11/16/18 9:46 PM
    Topspeed
    39217 471
    Porsche OFFICIAL: New 991.2 Turbo S Exclusive Series (2017) 11/14/18 11:25 AM
    RCA
    39043 637
    282 items found, displaying 1 to 30.