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911uk

Oil change advice

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11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHOil change advice

Leading reported evidence

Replace sump plug

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Performed · outcome unconfirmed

Ive just done mine and at the same time changed the sump plug for a magnetic one.

Oil change advice
Frequently discussed work

Check / top up as needed

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Suggestion

refill with 7.5 ltrs after a 30 min drain then run up to temp and check / top up as needed .

Oil change advice
Read full discussion summary

Leading evidence: 'Replace sump plug' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check / top up as needed' (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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Check / top up as needed

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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 contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion

refill with 7.5 ltrs after a 30 min drain then run up to temp and check / top up as needed .

Oil change advice

Recommend 5/40

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

Above 50k miles and i would recommend 5/40 .

Oil change advice

Replace are

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes
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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 want to look after my 911 properly so if oil changes are to be more regular doing it myself might be more convenient & save money.

Oil change advice

Replace oil every 5/6k miles

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

Plenty of people suggest changing the oil every 5/6k miles which is much more frequent than my previous cars (where I just waited for the indicator to flag it up).

Oil change advice
Frequently discussed actions (6)

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

Check / top up as needed

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

refill with 7.5 ltrs after a 30 min drain then run up to temp and check / top up as needed .

Oil change advice

Recommend 5/40

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

Above 50k miles and i would recommend 5/40 .

Oil change advice

Replace are

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 want to look after my 911 properly so if oil changes are to be more regular doing it myself might be more convenient & save money.

Oil change advice

Replace oil every 5/6k miles

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

Plenty of people suggest changing the oil every 5/6k miles which is much more frequent than my previous cars (where I just waited for the indicator to flag it up).

Oil change advice

Replace oil filter

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

When changing the oil filter then always look in the plastic canister ..

Oil change advice

Replace sump plug

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

Ive just done mine and at the same time changed the sump plug for a magnetic one.

Oil change advice
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.

11 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, It's a long time since I've carried out an oil change myself on any car but I'm wondering if I should do it myself on my 50k mile 2003 C4. I've spent time browsing the forum & elsewhere. Plenty of people suggest changing the oil every 5/6k miles which is much more frequent than my previous cars (where I just waited for the indicator to flag it up). I want to look after my 911 properly so if oil changes are to be more regular doing it myself might be more convenient & save money. I don't need to change it for another 4/5k miles but having looked underneath I don't think there clearance to crawl under - so my question is: how do I do this properly ie. raise the car on the level. It's compounded by the problem of having a gravel/pebble drive. Do I need a set of ramps or a couple of trolley jacks (but then the car isn't level). Or am I best taking just taking time out and taking the car to a Porsche indy & getting it done properly. It'll cost more and end up being a 2-3hr job if that's the case. Thanks again in advance for advice. Paul

POST 2Original post

You will need the car to be jacked up and on stands .. there simply isn't room otherwise . You will need a drain tub that holds upto 10 ltrs .. you will get about 8 - 8.5 out after a long drain .. in other words leave it for 30 mins to drain out . refill with 7.5 ltrs after a 30 min drain then run up to temp and check / top up as needed . I would go with 5/40 mobil one . It doesn't need changing at 4-5 k miles though .. min for me would be 10 k . oil is far better these days than it used to be .. hence the longer service intervals .. your choice though .

POST 3 / ORIGINAL POSTEROriginal post

Thanks Iain, If it's every 10k I can just run with regular servicing & save myself the cost of jack, stands, drain tub etc. Think I might go with that for now. I've driven around 1700 miles since I got the car a couple of months ago and have just put half a litre of oil in yesterday. Is that pretty normal?

POST 4Original post

I jack my cars up at the rear and drop the wheels onto 8" cinder blocks, it`s easy to get underneath and drain the oil then and completely safe with the handbrake on and in 1st gear :thumb: My drive is block paved but on an angle, so it ends up being level when on the blocks :grin: If your drive is gravel you may be better off with bits of railway sleeper as that would level out better on gravel.

POST 5Original post

What mileage and engine is it? I've had a 3.4 C2 since October which is around 65k miles and hasn't used one drop of oil and I must be approaching a 1,000 miles now.

POST 7Original post

I've done less than 1000 miles in my 3.6 C4S and had to put in 400ml / half a litre. No smoke or any signs of burning oil - and it is due an oil change. 114k miles. It's on 0w40 Mobil 1. It's got a really small oil leak, but it's not leaving any drips under the car.

POST 8Original post

No 2 cars are the same when it comes to oil usage . An Aos can allow more oil than normal to enter the inlet manifold and thus get burnt without showing any symptoms . Oil grade also makes a difference . Above 50k miles and i would recommend 5/40 . When changing the oil filter then always look in the plastic canister .. any engine problems and the early signs are metal fragments in the bottom of this .

POST 9Original post

Drain plud Ive just done mine and at the same time changed the sump plug for a magnetic one. Mine had been lowered so needed to purchase an ultra low profile jack to get the thing of the ground.

POST 10Original post

You can do it without lifting if you have a suitable drain pan just shallow enough to slide under. Check it holds 8 litres first!

POST 11Original post

You are indeed a masochist to put yourself through pain and suffering to do an oil and filter change this way Hats off to you there though !

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