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YOUR RESEARCHOil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Run leak down
Suggestion or failed attempt
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 contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Run leak down' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run leak down' (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 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.
Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test failing aos
Suggestion or failed attempt
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Unsuccessful attempts
1
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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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test hc
Suggestion or failed attempt
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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
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Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test vacuum at the oil filler cap
Suggestion or failed attempt
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 contain suggestions
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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
You test the vacuum at the oil filler cap with a manometer of your hand.Lots in Search.Your local Indie would do that in a few minutes.
Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use /if it is
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Suggestion
If there is oil consumption ,is it leaking or using /If it is using you need to give a specific rate of use for a useful opinion.If the AOS is failing ,that would cause it.So start with that and be aware of the problems with replacement AOS units .
Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use useful opinion.if the aos is failing
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
If there is oil consumption ,is it leaking or using /If it is using you need to give a specific rate of use for a useful opinion.If the AOS is failing ,that would cause it.So start with that and be aware of the problems with replacement AOS units .
Oil and Coolant Consumption - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
2006 CS has about 22K on the odometer. I purchased it with 10.7K on the clock. I drive it daily (about 75 miles/day). I have not tracked this car yet but I do not baby it. At about 18K I noticed the oil level dropping a little more rapidly than I'd like. I also noticed coolant level was low. Coolant took about one quart to bring to the min level.
I just did my 3rd oil change (0-40 M1) a couple weeks ago and it has dropped one quart in 450 miles. Coolant level is also below min level again.
I always cut oil filter open and inspect. To date the filters have not shown anything.
Also, at around 18K I've noticed the exhaust tip was really sooty.
There is no smoke at start-up or upon hard acceleration.
Do you think an AOS could be the cause at 22K? Or do you suspect something more serious?
thanks
Not sure if you want keyboard mechanic speculation or serious diagnosis.
I'll go with diagnosis:
There is a simple test for a failing AOS. You test the vacuum at the oil filler cap with a manometer of your hand.Lots in Search.Your local Indie would do that in a few minutes.
Sooty exhaust- is it unburnt fuel or oil ? CEL ?Tailpipe test for HC?
If there is oil consumption ,is it leaking or using /If it is using you need to give a specific rate of use for a useful opinion.If the AOS is failing ,that would cause it.So start with that and be aware of the problems with replacement AOS units .
IIRC, the Owner's Manual states the oil consumption limit as 1 liter per 1000 km (or 1 qt per 586 miles). Thus, the oil consumption of 1 qt per 450 miles is definitely high and over the factory limit.
With use that high, I would investigate to find where its going...
Well both oil AND coolant are low...
If it were just oil or just coolant, lots of possibilities. Coolant gets high, then oil in coolant, oil cooler?
Oil could be AOS, coolant is either leaking in the trunk or leaking through cracked cyl head or head gasket.
Not enough info
