Increased oil consumption Boxster 987 RS 60 Spyder?

  • Hello everyone,

    A friend of mine has a Boxster 987 RS Spyder with 90,000 km on the clock. The car needs about 1 liter of oil per 1000 km, which is a bit much in my opinion.

    The type of oil is Mobile 5 W50, yesterday all cylinders were end-scoped without any findings. The spark plug on the 5 cylinder is black, all other plugs are inconspicuous.

    Do you have any idea where the increased oil consumption could be coming from? Are the 303 hp engines known to be susceptible?

    He doesn't want to just open up the engine without any findings, perhaps one of you has already had a similar problem with this engine.

    Regards

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    Herzliche Grüße

    Jens

    996 3,4 C2:thumb:

    964 3,6 C2:drive:

    911 G-Modell 3,2 G50:thumb:

  • First thought: "bore scoring" - but the endoscopy was unremarkable.

    (How was the endoscopy performed: through the spark plug holes or from below, after removing the oil pan?)

    Any other abnormalities? Cold start behavior? Blueing when starting? Noises? Hydros ok? Fuel consumption? Year of manufacture? DFI? Abnormalities in the oil ("shimmering" due to abrasion; chips in the oil filter)?

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  • First thought: "bore scoring" - but the endoscopy was unremarkable.

    (How was the endoscopy performed: through the spark plug holes or from below, after removing the oil pan?)

    Any other abnormalities? Cold start behavior? Blueing when starting? Noises? Hydros ok? Fuel consumption? Year of manufacture? DFI? Abnormalities in the oil ("shimmering" due to abrasion; chips in the oil filter)?

    Endoscopy through the spark plug holes, otherwise everything inconspicuous, except for the black spark plug and the increased oil consumption, year of manufacture 2008.

    This post has been automatically translated.

    Herzliche Grüße

    Jens

    996 3,4 C2:thumb:

    964 3,6 C2:drive:

    911 G-Modell 3,2 G50:thumb:

  • Read out the DME to see if there are any errors?

    If it has DFI, is an injection pump possibly defective?

    If necessary, perform an endoscopy through the crankcase after removing the oil pan to be able to assess the lower cylinder walls?

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  • Read out the DME to see if there are any errors?

    If it has DFI, is an injection pump possibly defective?

    Possibly an endoscopy through the crankcase after removing the oil pan to be able to assess the lower cylinder walls?

    Hello, thank you, that would be another idea.

    This post has been automatically translated.

    Herzliche Grüße

    Jens

    996 3,4 C2:thumb:

    964 3,6 C2:drive:

    911 G-Modell 3,2 G50:thumb:

  • Read out the DME to see if there are any errors?

    If it has DFI, is an injection pump possibly defective?

    Possibly an endoscopy through the crankcase after removing the oil pan to be able to assess the lower cylinder walls?

    Hello, thank you, that would be another idea.

    No, not a good idea. It's a 2008 intake manifold injector, no DFI.

    If the endoscopy was done really well and you can't see anything, then it's possible that the oil scraper ring on cylinder 5 is defective or the valve stem seal on the intake valve is defective.

    Does the engine smoke at cold start?

    Is the oil separator on the crankcase ventilation ok?

    This post has been automatically translated.

    Boxster S 2008
    Carrera GT3 2006

  • Hello, thank you, that would be another idea.

    No, not a good idea. It's a 2008 intake manifold injector, no DFI.

    If the endoscopy was done really well and you can't see anything, then it's possible that the oil scraper ring on cylinder 5 is defective or the valve stem seal on the intake valve is defective.

    Does the engine smoke at cold start?

    Is the oil separator on the crankcase ventilation ok?

    Yes, it's not a DFI, doesn't smoke much when starting, not even at cold start, endoscopy was carried out at the service center, we also suspected oil scraper rings, can they be made to work again, e.g. with an additive?

    This post has been automatically translated.

    Herzliche Grüße

    Jens

    996 3,4 C2:thumb:

    964 3,6 C2:drive:

    911 G-Modell 3,2 G50:thumb:

  • No, not a good idea. It is a 2008 intake manifold injector, no DFI.

    If the endoscopy was done really well and you can't see anything, then it's possible that the oil scraper ring on cylinder 5 is defective or the valve stem seal on the intake valve is defective.

    Does the engine smoke at cold start?

    Is the oil separator on the crankcase ventilation ok?

    Yes, it's not a DFI, doesn't smoke much when starting, not even at cold start, endoscopy was carried out at the service center, we also suspected oil scraper rings, can they be made workable again, e.g. with an additive?

    No. If they are defective, then they are usually broken. Otherwise one cylinder would have to have deposits, which is illogical that it only affects one cylinder.

    You could look at the valves again with an endoscope to see if you can find oil on them.

    This post has been automatically translated.

    Boxster S 2008
    Carrera GT3 2006

  • Was the compression also measured?

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    Gruß Armin alias ARMPAS... hat nach X dicken Moppeds vor Jahren auf den Boxster gewechselt :drive: später auf Boxster "S plus" :roargh:

  • Was the compression also measured?

    A leak down test is better

    This post has been automatically translated.

    Boxster S 2008
    Carrera GT3 2006