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Porsche Forum Australia

996 GT3 gearbox oil

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

Discussion summary

YOUR RESEARCH996 GT3 gearbox oil

Leading reported evidence

Check specs

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

You can check the specs to compare lubricants in the product data sheets on the Mobil oil website:

996 GT3 gearbox oil
Read full discussion summary

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

Read captured replies

1 matching discussions · 8 captured posts examined · 1 partial discussions

Compare 1 other evidence results

Recommend mobilube shc75w-90 as a substitute

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

Mobil distributor has recommended Mobilube SHC75W-90 as a substitute.

996 GT3 gearbox oil
Frequently discussed actions (2)

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

Check specs

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

You can check the specs to compare lubricants in the product data sheets on the Mobil oil website:

996 GT3 gearbox oil

Recommend mobilube shc75w-90 as a substitute

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

Mobil distributor has recommended Mobilube SHC75W-90 as a substitute.

996 GT3 gearbox 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.

8 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: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, has anyone had their gearbox oil changed? I am having trouble sourcing the correct oil which i believe is Mobilube PTX75W-90. Porsche part number is 0004 320 420. Mobil distributor has recommended Mobilube SHC75W-90 as a substitute. Can anyone confirm that this an acceptable substitute?

POST 2Original post

You can check the specs to compare lubricants in the product data sheets on the Mobil oil website: http://www.exxonmobil.com/pdssearch/search.aspx?chooseLanguage=en&CountryValue Also discussion here might interest you: http://rennlist.com/forums/997-gt2-gt3-forum/482501-mobilube-ptx-transaxle-gear-box-oil.html

POST 3 / ORIGINAL POSTEROriginal post

thanks Peter M, some say yes, others say no. i can get PTX thru Porsche Australia, but its $1000 for 20 litres... and i only need 4 litres. i can get the SHC for $320/20 litres.

POST 4Original post

OMG! I'd try ebay: http://www.ebay.com.au/itm/Mobilube-1-SHC-75W90-Fully-Synthetic-Gear-Oil-142382-4x1L-4L-/151251146829?pt=LH_DefaultDomain_3&hash=item233745584d or go and read some labels at Repco, Autobarn or Supercheap!

POST 5Original post

Quotes source post: 101551

Yes it is suitable. It's popular in the UK in the GT3 community, I've run it (and swepco 201 which wasn't as good for my UK driving conditions)  in my LSD transaxle as well. Here's some extra info - http://www.lufteknic.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=Mobil75-90delvac&Category_Code=lubricants The Delvac is marketed as Mobil SHC outside the US.

POST 6Original post

So Kelly, you should be able to buy that locally from a Mobil depot as it's used in trucks as well commonly? http://www.mobil.com/AP-English-LCW/heavydutyoils_au_transmission-products_mobil-delvac-synthetic-gear-oil.aspx

POST 7 / ORIGINAL POSTEROriginal post

i wouldnt have thought that oil would be easy to freight in from overseas? But $46 from the US is very tempting...

POST 8Original post

I've bought oil off Amazon before.  Quick and convenient and sure beats ringing around trying to find a needle in a haystack!

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