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Porsche Forum Australia

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil

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6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHGearbox (manual transmission) oil selection instead of Porsche unicorn oil

Leading reported evidence

Replace 'box oil

Performed · outcome unconfirmed

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Performed · outcome unconfirmed · Original poster

Update: Changed the 'box oil.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil
Frequently discussed work

Check their website

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Suggestion

Check their website for a suitable oil for your gearbox.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil
Read full discussion summary

Leading evidence: 'Replace 'box oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check their website' (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 · 6 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Use redline 75w 90

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

Ended up using Redline 75w 90.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil

Check their website

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

Check their website for a suitable oil for your gearbox.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil

Replace gearbox oil

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'm looking to improve the shift feel in my 718S by changing the gearbox oil.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil
Frequently discussed actions (4)

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

Check their website

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

Check their website for a suitable oil for your gearbox.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil

Replace 'box oil

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

Update: Changed the 'box oil.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil

Replace gearbox 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 · Original poster

I'm looking to improve the shift feel in my 718S by changing the gearbox oil.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil

Use redline 75w 90

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

Ended up using Redline 75w 90.

Gearbox (manual transmission) oil selection instead of Porsche unicorn oil
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.

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

  • Porsche Forum Australia: 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: 20261028T003752Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I'm looking to improve the shift feel in my 718S by changing the gearbox oil.  As I'm the 4th owner, the contents of the 'box is uncertain.  My local Porsche centre specify the genuine stuff (part number 000 043 305 48) as Mobil PTX 75W-90, but only sell it in 20 litre drums for $2k.  I cannot find a source of PTX in smaller containers in Australia, and overseas sources won't ship to Australia.   So... here is what I've found, which claims to be an alternate to PTX: Redline 75W90 gear oil Has anyone tried this in a G8220 box or similar?  Thanks.

POST 2Original post

Quotes source posts: 394123, 394132

I had the same problem trying to source PTX for my 997 C2S manual. A few years ago, a friendly Porsche parts manager sold me about 3 liters of their approved oil. Tried again last year and was knocked back. Ended up using Redline 75w 90. A quality oil suitable for my car. Check their website for a suitable oil for your gearbox. Just checked the link you posted and it's suitable as an alternative to PTX. Suitable replacement for: Porsche N052911CO Dodge/Jeep 4549636 GM 88862475 Subaru SOA635011 Agip 75W-90 SX Agip SXA 75W-90 Mobil Mobilube 75W-90 SHC Mobil Delvac 75W-90 Mobil Mobilube PTX 75W-90 Shell Spirax EP 90 Shell Transaxle Oil 75W-90 Shell Spirax S5 ATE 75W-90

POST 3Original post

https://www.eclubes.com.au/gear-oils SHC 75-90 in all my GT3's & 996 Cup Cars

POST 4Original post

I just bought some Swepco 201 from the US with free delivery. I'm waiting for it to arrive. They also sell the one you are after .. with free delivery. Cheers ... https://www.amazon.com.au/Red-Line-57905-75W90-Synthetic/dp/B000J3ASP0/ref=mp_s_a_1_2?crid=3LHOP5MKOCTTF&keywords=redline+75w90&qid=1690877322&sprefix=redline+75%2Caps%2C396&sr=8-2

POST 5 / ORIGINAL POSTEROriginal post

Thanks all - I've ordered the Redline stuff (important to get the 'NS' version for a transaxle).  My friendly mechanic (also owns a 718 but PDK) was happy with that choice.  I'll update when the change is done and tested.

POST 6 / ORIGINAL POSTEROriginal post

Update: Changed the 'box oil.  Fairly easy job if you are a contortionist.  No tray or covers or struts to unbolt. Definite small improvement, but still feeling uncomfortable 1>2 shifts esp when cold.  I have had the service advisor at the local dealership drive it and give it a "normal" verdict.  More importantly I have driven a 981 6 speed and the owner of that car drove mine.  Conclusion: it's normal enough - just get used to it and take the shifts 1>2 slowly. Moving on to grills, dash cam and other fun. :)

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