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white goo in oil filler neck

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHwhite goo in oil filler neck

Leading reported evidence

Run cooler than 928s

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
Do these cars run cooler than 928s?
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white goo in oil filler neck

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Leading evidence: 'Run cooler than 928s' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run cooler than 928s' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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1 matching discussions · 3 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Run cooler than 928s

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Do these cars run cooler than 928s?
Original post Read captured discussion
white goo in oil filler neck

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi All, We've put over 1000km on the 99 996 in just over a week and a half. Checked oil level, and it was precisely where it should be, and was clear... However, the coolant has a slow leak which is going to be looked at. There doesn't seem to be any visual leaks, but the oil filler neck has some white "goo" residue, around the top inch (closest to the cap). The oil appears clear however. Is this normal (the "goo" I mean)? I'm hoping that it is simply a slow leak that is getting burned off before it can drip on the floor, but are these cars prone to leaking coolant in other locations? Any input appreciated! Car has around 88,000KM or around 55,000 miles Jeff

POST 2Original post

That's normal. Condensation in the oil - gets worse if it's cold out and you don't drive the car long/hard enough to boil off all of the moisture in the oil.

POST 3 / ORIGINAL POSTEROriginal post

Thanks Chip for your reply. I agree with you and GrantG that it is likely due to excess moisture. The car had just had an oil change, but it may have been sitting at the dealer for a while. The residue doesn't seem to be getting any worse, so I suspect it's not a major problem. The car is used as a daily driver, 50 min to work both ways, mostly highway, so I don't think there is a problem with it warming up. Do these cars run cooler than 928s? Thanks again for the replys, Jeff.

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