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Transmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHTransmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Replace transmission oil next month

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

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 will be changing my transmission oil next month, after some long research I have a problem deciding if I should use:
Original post Read captured discussion
Transmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Read full discussion summary

Leading evidence: 'Replace transmission oil next month' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace transmission oil next month' (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.

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

Compare 2 other evidence results

Use delvac

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 · Original poster
Anyone using Delvac on the their Boxster S?
Original post Read captured discussion
Transmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use factory gear oil

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
I always use the factory gear oil.
Original post Read captured discussion
Transmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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.

Replace transmission oil next month

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 will be changing my transmission oil next month, after some long research I have a problem deciding if I should use:
Original post Read captured discussion
Transmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use delvac

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
Anyone using Delvac on the their Boxster S?
Original post Read captured discussion
Transmission Fluid: Mobil Delvac or Porsche factory? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use factory gear oil

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
I always use the factory gear oil.
Original post Read captured discussion
Transmission Fluid: Mobil Delvac or Porsche factory? - 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.

3 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: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, I know how we all hate oil debates but I just want to ask for some opinions. I will be changing my transmission oil next month, after some long research I have a problem deciding if I should use: Mobil Delvac 75W-90 Gear oil - Mobil Delvac 75W-90 (1 gallon) – Lufteknic or the factory: ORMD-TRANS OIL 1LTR - Porsche (999-917-546-00) It is for a 2003 Boxster S. Anyone using Delvac on the their Boxster S? Thanks

POST 2Original post

I always use the factory gear oil.

POST 3Original post

Stick with the Porsche transmission fluid. I know it's expensive, but it's only every 90k miles. People tend to poor shifting with non-OEM fluid. More info here: http://986forum.com/forums/general-discussions/30441-manual-transmission-fluid-best-brands.html

This is a source reference. Confirm exact model applicability in the original material.