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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOil - the ever changing saga..
Leading reported evidence
Replace back
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Performed · outcome unconfirmed
I have run my 2002 C4S on Millers 10w50 nanodrive for around 5 years but noticed that it smoked a little on cold start up in winter.Changed back to Mobil 1 0w40 and the smoking has stopped.No idea why it smoked using the thicker oil.
Leading evidence: 'Replace back' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend 0w40 mobil' (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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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
At the time Porsche changed from Shell to Mobil, I wrote to Porsche to have them confirm that this new oil was entirely suitable for use in my then 80K mile 911 SC They were kind enough to write back and provided all sorts of data to confirm that Mobil was indeed suitable for older Porsches...
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 have run my 2002 C4S on Millers 10w50 nanodrive for around 5 years but noticed that it smoked a little on cold start up in winter.Changed back to Mobil 1 0w40 and the smoking has stopped.No idea why it smoked using the thicker oil.
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 use Mobile 5-40 as advised by my Indy for the 996, and have also use the same oil in my Boxster which I have had from new it's a 1997 and has done 211k miles with no work done to the engine or gearbox, I do change the oil every 5k miles and I think this is more important than the type of oil, which is why my engine has done ballistic mileage.
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 use Mobile 5-40 as advised by my Indy for the 996, and have also use the same oil in my Boxster which I have had from new it's a 1997 and has done 211k miles with no work done to the engine or gearbox, I do change the oil every 5k miles and I think this is more important than the type of oil, which is why my engine has done ballistic mileage.
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 have run my 2002 C4S on Millers 10w50 nanodrive for around 5 years but noticed that it smoked a little on cold start up in winter.Changed back to Mobil 1 0w40 and the smoking has stopped.No idea why it smoked using the thicker oil.
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
At the time Porsche changed from Shell to Mobil, I wrote to Porsche to have them confirm that this new oil was entirely suitable for use in my then 80K mile 911 SC They were kind enough to write back and provided all sorts of data to confirm that Mobil was indeed suitable for older Porsches...
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 have run my 2002 C4S on Millers 10w50 nanodrive for around 5 years but noticed that it smoked a little on cold start up in winter.Changed back to Mobil 1 0w40 and the smoking has stopped.No idea why it smoked using the thicker oil.
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
My 2012 C4S has covered 42k miles before I got my hands on it it has had quite a few registered owners in that time, but it did have a full Porsche history right up to the last intermediate service which was performed by a recognised Porsche indy, who advertises as using Mobil oils...
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 use Mobile 5-40 as advised by my Indy for the 996, and have also use the same oil in my Boxster which I have had from new it's a 1997 and has done 211k miles with no work done to the engine or gearbox, I do change the oil every 5k miles and I think this is more important than the type of oil, which is why my engine has done ballistic mileage.
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.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 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: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all,
I appreciated this will have been discussed numerous times but what is the latest recommendation ? 911 Carrera 4S 2004
To summarise :-
New - Porsche recommended 0w40 Mobil
Now - Porsche recommend 5w50
People seem to use 5w40 a lot ?
It's just been serviced prior to my ownership and it's got 5w30 in !
At a loss 😂
Any advice / recommendations to what is suitable would be appreciated and understand I have opened a can of worms so sorry in advance 😂
It usually just comes down to what the OPC or your preferred local Indy decides on as their staple oil choice.
Mine has Mobil1 0w40 in it now because it went to Porsche Specialist Services and that's what they put in.
Prior to that it had Mobil1 5w40 in it because that's what Autostrasse use.
I can't say I've noticed any difference and I don't suppose I ever will.
It pays not to sweat the small stuff.
I personally wouldn't be that happy with 5W30 in the motor, that is significantly thinner than the as new OE fill... What does the oil pressure gauge sit at when the car is hot - when the rad fans come on for example?
Thanks - I think I will certainly change the 5w30 I don't think that's really a suitable option at all ?
Just need to decide now if it's 0w40 / 5w40 or 5w50 😮 although Porsche now say 5w50 so I maybe more inclined to go down that route
Fair enough! As to the new fill... you're best off just flipping a coin to be honest!
I've used 5W40, my car is on 75k which I think of as fairly new, maybe once I get to 100k I'll switch over to 5W50? Thicker oil will be better for more worn bearing surfaces possibly? Who knows, maybe the motor will explode before then!
My take on the oil is that provided you're using a good quality oil and it's thereabouts in terms of viscosity then frequency of change is much more important.
My engine was rebuilt 40K ago by Hartech and they suggest Millers 10/50 for all M96 engine regardess of mileage, so I stick with that.
My 2012 C4S has covered 42k miles before I got my hands on it it has had quite a few registered owners in that time, but it did have a full Porsche history right up to the last intermediate service which was performed by a recognised Porsche indy, who advertises as using Mobil oils... I recently jumped through hoops to have it accepted onto the Porsche extended warranty scheme, which requires only Porsche spec servicing for as long as I wish to insure it under that scheme... That Porsche`s insurers will continue cover my C4s up to circa14 years old and 140k miles or so, using only Porsche`s choice of oils, then I suspect there is little incentive to choose otherwise..?
At the time Porsche changed from Shell to Mobil, I wrote to Porsche to have them confirm that this new oil was entirely suitable for use in my then 80K mile 911 SC They were kind enough to write back and provided all sorts of data to confirm that Mobil was indeed suitable for older Porsches... Who am I to argue with that..?
Good luck in your choices.. :thumb:
I have run my 2002 C4S on Millers 10w50 nanodrive for around 5 years but noticed that it smoked a little on cold start up in winter.Changed back to Mobil 1 0w40 and the smoking has stopped.No idea why it smoked using the thicker oil.
I use Mobile 5-40 as advised by my Indy for the 996, and have also use the same oil in my Boxster which I have had from new it's a 1997 and has done 211k miles with no work done to the engine or gearbox, I do change the oil every 5k miles and I think this is more important than the type of oil, which is why my engine has done ballistic mileage.
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