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Porsche Forum Australia

The right oil spec

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

Discussion summary

YOUR RESEARCHThe right oil spec

Leading reported evidence

Fill ex factory

Performed · outcome unconfirmed

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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 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

Some cars these days are filled ex factory with a 0W-20.

The right oil spec
Read full discussion summary

Leading evidence: 'Fill ex factory' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill ex factory' (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 · 14 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Run liqui moly 5w-40 molygen

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

I'm running Liqui Moly 5W-40 Molygen...

The right oil spec

Use 8 litres

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

Looking through old invoices from PO, Autohaus charged him $183.00 and used 8.5 litres for Mobil 1 and another service only used 8 litres.

The right oil spec

Use 8.5 litres

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

Looking through old invoices from PO, Autohaus charged him $183.00 and used 8.5 litres for Mobil 1 and another service only used 8 litres.

The right oil spec

Use castrol edge 5w-40 a3, was expecting mobil 1

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

Just had my 80,000km/2 year service by Porsche Townsville and they used Castrol Edge 5W-40 A3, was expecting Mobil 1.

The right oil spec
Frequently discussed actions (10)

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

Fill ex factory

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

Some cars these days are filled ex factory with a 0W-20.

The right oil spec

Recommend by...anyone - especially in australia

No successful repair reported for this finding.

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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've never seen 5w-30 recommended by...anyone - especially in Australia.

The right oil spec

Recommend oil pressure

No successful repair reported for this finding.

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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

No issue with the 30 oil BTW from a viscosity perspective, as long as you can maintain the recommended oil pressure with that weight oil.

The right oil spec

Replace 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

Got around to changing the oil.

The right oil spec

Run liqui moly 5w-40 molygen

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

I'm running Liqui Moly 5W-40 Molygen...

The right oil spec

Run motul 5w-40

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've run Motul 5w-40 for the last few years on the recommendation of my mechanic who runs Motul in a number of track / road rally cars - Porsches and other breeds.

The right oil spec

Run shell helix ultra 5w-40

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'd run Shell Helix Ultra 5w-40.

The right oil spec

Use 8 litres

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

Looking through old invoices from PO, Autohaus charged him $183.00 and used 8.5 litres for Mobil 1 and another service only used 8 litres.

The right oil spec

Use 8.5 litres

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

Looking through old invoices from PO, Autohaus charged him $183.00 and used 8.5 litres for Mobil 1 and another service only used 8 litres.

The right oil spec

Use castrol edge 5w-40 a3, was expecting mobil 1

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

Just had my 80,000km/2 year service by Porsche Townsville and they used Castrol Edge 5W-40 A3, was expecting Mobil 1.

The right oil spec
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.

14 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: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Morning all. Not looking to open a can of worms but keen to hear what oil you run in your car. Context to this is, like some other things I had expected were completed prior to delivery of my 996 C2, some short cuts were taken which I’m only now discovering. Have just looked back at the documents of work done to the car and can see the mechanic put in 5w30 engine oil, which to me does not sound right - I don’t even put that in my GTI... From what I can see the oil that SHOULD have been used is the 0w40 or 5w40 spec in the A40 list. Sound right?

POST 2Original post

Correct. I'd run Shell Helix Ultra 5w-40.  Meets all the important specs like A3/B4 plus A40, is relatively cheap and readily available from Repco and Supercheap.

POST 3Original post

I've run Motul 5w-40 for the last few years on the recommendation of my mechanic who runs Motul in a number of track / road rally cars - Porsches and other breeds.  It is my understanding they have several versions of each of their oil grades, with one that meets the Porsche factory specs.

POST 4Original post

Drain it out.  Especially as its still summer. I've never seen 5w-30 recommended by...anyone - especially in Australia.  Maybe ok in Sweden.  Jump on the Shell / Castrol / Mobil etc oil selectors for Australia on their websites and they will all recommend something with a minimum of 40 on the end. I've run Mobil 1 0w-40, Shell Helix Ultra 5w-40 and currently Mobil 1 5w-50 and cannot detect any difference between them.

POST 5 / ORIGINAL POSTEROriginal post

Thanks guys. Sounds like I’ll have to drain it out this weekend. Just kicking myself I didn’t check it earlier...

POST 6Original post

I notice Penrite HPR5 is on special at Supercheap for the next couple of weeks for 44 bucks for 6 litres.

POST 7 / ORIGINAL POSTEROriginal post

Good find @Peter M . I was on their website yesterday and didn’t see the 6L special. Good price.

POST 8Original post

I have used Castrol edge 5w-40 without any issues so far.

POST 9 / ORIGINAL POSTEROriginal post

Got around to changing the oil. My god... I reckon over ten litres came out and it looked pretty dark. Not good, given I had only put something like 1000 kilometres on it. 😳 😳 😳 Anyway has some nice 5w-40 Penrite in her now! https://www.instagram.com/p/ButFK06Dtmv/?utm_source=ig_share_sheet&igshid=77kn93gsp33r

POST 11Original post

Quotes source post: 283605

I think that pic has helped me decide on my numberplate choice for Ken 👍

POST 12Original post

Quotes source post: 282163

0W-40 Mobil 1 is the factory recommendation, I'd be trusting those Porsche engineers who suggested it since they've done the development for you.  The other way to do it would be to try the others and have an oil analysis done and compare.  Anything else without hard data is pure speculation as to its superiority. No issue with the 30 oil BTW from a viscosity perspective, as long as you can maintain the recommended oil pressure with that weight oil.  Some cars these days are filled ex factory with a 0W-20.

POST 13Original post

Quotes source post: 284952

Just had my 80,000km/2 year service by Porsche Townsville and they used Castrol Edge 5W-40 A3, was expecting Mobil 1. They did not mention what oil they were going to use. Interestingly, quantity was 7.5 litres, price was $81.80 ex GST. Looking through old invoices from PO, Autohaus charged him $183.00 and used 8.5 litres for Mobil 1 and another service only used 8 litres. Invoice from PC Willoughby in 2009, $225.00 for Mobil 1 (no quantity).

POST 14Original post

Age and mile play a part in the needs of the car. On the recommendation of Autohaus I went with a 5W-40, they even said a 10W-40 would be OK if mileage high and its pushed hard. I'm running Liqui Moly 5W-40 Molygen...

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