6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCayenne Gearbox/Diff/Engine Oils
Reported or suspected cause
porsche only recommend esso
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that suspect a cause
1
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Suspected cause
I suspect Porsche only recommend Esso because of their commercial arrangement with ExxonMobil.
Leading evidence: 'porsche only recommend esso' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'porsche only recommend esso' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Recommend esso' (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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Discussions that contain suggestions
1
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Suggestion
I suspect Porsche only recommend Esso because of their commercial arrangement with ExxonMobil.
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Suggestion · Original poster
Okay, so doing some research before taking the plunge - anything I buy I'm going to change all the fluids.
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.
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Suggestion
Not that this is of any help but I asked Porsche Centre about the gearbox service, they said the books don't recommend changing until 160,000 kms!
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
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Suggestion · Original poster
(although I won't be using the Toyota fluid he's suggesting...
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6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Forum Australia: 1 discussions
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0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Okay, so doing some research before taking the plunge - anything I buy I'm going to change all the fluids.
Anyone have any information on differential and gearbox oils for the Cayenne? Apparently most manuals say 'return to dealer' when it comes to fluids, but it can't be that bad (Porsche genuine is over $100 a litre for gearbox oil
)
Anyone got any hot tips on what brands/fluids to run? According to my research the differential oil is a SAE 75-90 synthetic, anyone got any tips on what to run? and what current owners are running?
Gearbox oil I found on the web is per below - good place to start I guess - There is a service bulletin referring to ESSO 3309 (who knew ESSO was still going?!)
I assume it's now Mobil?
http://www.mobil.com/AP-English-LCW/carengineoils_au_transmission-products_mobil-atf-3309.aspx
Russ,
I assume the transmissions in these are ZF's? If so the ZF website has a list of approved oils for each transmission types in addition to their own branded fluids. I suspect Porsche only recommend Esso because of their commercial arrangement with ExxonMobil.
Not that this is of any help but I asked Porsche Centre about the gearbox service, they said the books don't recommend changing until 160,000 kms! I thought that was ridiculous even for a car that never sees a trailer in its life so I'll probably supply some oil and get them to do it at the next annual service.
I'm about to do this, bought a filter + o ring + pan gasket for $50 out of the US. Just need to find a local source of ESSO/Mobil JWS 3309
Fairly good video on the procedure here -
https://www.youtube.com/watch?v=8dgHlz3_3jc
(although I won't be using the Toyota fluid he's suggesting... it seems like a bit of a gamble to save a small amount of money)
Having the transmission fluid at 40degrees might be fairly difficult without a PIWIS or Durametric though!
This is a source reference. Confirm exact model applicability in the original material.
