Porsche Club GB

Best Oil?????

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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 RESEARCHBest Oil?????

Leading reported evidence

Recommend by porsche

Suggestion or failed attempt

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Reported fixes: 0
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

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 understand Mobil 1 is recommended by Porsche, but I see varying opinions on the type - 0/40 fully sun to 10/60 for older engines?
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Best Oil?????

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Leading evidence: 'Recommend by porsche' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend by porsche' (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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Recommend c4s 2003

Suggestion or failed attempt

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

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

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Suggestion · Original poster
Which oil would people recommend for a C4S 2003, with 93k on the clock?
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Best Oil?????

Recommend millers (cfs) nanodrive 10w-50

Suggestion or failed attempt

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
Harlech recommend Millers (CFS) Nanodrive 10W-50 and use it in their maintenance plan.
Original post Read captured discussion
Best Oil?????

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Recommend by porsche

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
I understand Mobil 1 is recommended by Porsche, but I see varying opinions on the type - 0/40 fully sun to 10/60 for older engines?
Original post Read captured discussion
Best Oil?????

Recommend c4s 2003

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
Which oil would people recommend for a C4S 2003, with 93k on the clock?
Original post Read captured discussion
Best Oil?????

Recommend millers (cfs) nanodrive 10w-50

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
Harlech recommend Millers (CFS) Nanodrive 10W-50 and use it in their maintenance plan.
Original post Read captured discussion
Best Oil?????

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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.

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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi all and Happy New Year I am sure this has been answered many times before. Which oil would people recommend for a C4S 2003, with 93k on the clock? I understand Mobil 1 is recommended by Porsche, but I see varying opinions on the type - 0/40 fully sun to 10/60 for older engines? Does it really make a difference? What is your poison? Cheers!!

POST 2Original post

Hi - look for the A40 specification. In the uk we have fairly modest temperature extremes which I think could give us greater freedom, but a 5w-40 is normally an enthusiasts favourite. The version I use is Mobil 3000. Synthetic oils will have better shear stability (viscosity stability). Opie oils is a good source of information and oil! KR, Lee

POST 3Original post

Harlech recommend Millers (CFS) Nanodrive 10W-50 and use it in their maintenance plan. I went from Mobil1 to Millers and the car starts more easily, that's for sure.

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