14 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHMayonaise in oil filler
Leading reported evidence
Check oil and there is little in there so
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
Had an oil warning light appear on dash this evening and then checked oil and there is little in there so checked the oil filler cap and its got quite a lot of mayonaise gunge in there
Leading evidence: 'Check oil and there is little in there so' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check dipstick rather rely' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
Used to happen on my BMW until I replaced the oil filler cap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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
I would keep an eye on oil, though (check the dipstick rather rely on the dash display).
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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
I have cleaned the mayo away and will see if it comes back.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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
My car uses about 1 litre of oil every 1,200 miles btw.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
Had an oil warning light appear on dash this evening and then checked oil and there is little in there so checked the oil filler cap and its got quite a lot of mayonaise gunge in there
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
The oil filler pipe is long so if the car's only used for short trips it's unlikely to get warm enough to dispel the condensation built up in it, hence the water/oil mix (i.e.
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.
14 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 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: 20261026T220748Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Had an oil warning light appear on dash this evening and then checked oil and there is little in there so checked the oil filler cap and its got quite a lot of mayonaise gunge in there
Mayo is very common in the filler tube. As long as there is no oil in the water, or vice-versa, don't worry. Sounds like you need to keep an eye on the oil level, though.
There is nothing in the water and the car is performing as it should with no noises or loss of performance of any kind.
It doesnt look like there is mayo throughout the tube, only at the end where the filler cap screws.
very common in the 996. I had an original 3.4 996 which had the same problem. I dont find it in the post facelift model though., I wouldnt worry and some oil use is normal. What year and engine size is yours ?
Gave me one helluvva shock too, the first time I saw it but, as Richard has said, it's pretty much routine. Short trips (e.g. down to the shops and back), esp. during the winter, is a good way of causing it. Decent runs, good temperature, and generally when the weather's warmer, and it should disappear. The oil filler pipe is long so if the car's only used for short trips it's unlikely to get warm enough to dispel the condensation built up in it, hence the water/oil mix (i.e. mayo) develops. There can be "geniuine" reasons (after all, mayo around the oil filler cap is a tell-tale indicator in most cars), but it really is typical with the 996. It's quite a common query so you shouldn't have much difficulty finding more information elsewhere about it. I would keep an eye on oil, though (check the dipstick rather rely on the dash display).
Mines a 03 plate 3.6.
I have cleaned the mayo away and will see if it comes back.
in reality however i do only work 2 miles from where i live and 95% of my journeys range from taking my sons to school and childcare and then too and from work so journeys of 2-4 miles at a time.
I found mine was really bad over winter, loads of mayo.
But since the warmer weather (and a 1,000 mile blast to Germany) I have almost none now.
My car uses about 1 litre of oil every 1,200 miles btw.
[
]
I am sure they will be happy to use any of the approved oils on the list in the Technical Articles section. If you ask them if you can supply your own you will save a few quid too!
