fullymatted.
Back to search
Rennlist

Mixing Oil wieghts?

Add to repair workspace
Open repair workspace
Original source
5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHMixing Oil wieghts?

Leading reported evidence

Use last

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 · Original poster

I'd like to add a little oil because of burn-off, but don't know what the dealer used last.

Original post Read captured discussion
Mixing Oil wieghts?
Read full discussion summary

Leading evidence: 'Use last' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use last' (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 · 5 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Use of the same weight during full oil

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

I'm pretty sure that I saw in the manual that you can top up with any weight synthetic but to use all of the same weight during full oil changes.

Original post Read captured discussion
Mixing Oil wieghts?
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.

Use last

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 · Original poster

I'd like to add a little oil because of burn-off, but don't know what the dealer used last.

Original post Read captured discussion
Mixing Oil wieghts?

Use of the same weight during full 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

I'm pretty sure that I saw in the manual that you can top up with any weight synthetic but to use all of the same weight during full oil changes.

Original post Read captured discussion
Mixing Oil wieghts?
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.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 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: 20261027T013556Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I'd like to add a little oil because of burn-off, but don't know what the dealer used last. I was planning to put in Mobile 1 with a 15W50 weight -- if the dealer put in a different weight, am I playing with fire? Or can two weights mix ok? Thanks.

POST 2Original post

Different engine oils can be mixed, even synthetic and mineral. However, it would clearly be preferable to top-up with the same oil as the original. Factory fill is Mobil 1 0W-40, but there should be little label in the engine compartment telling you what's been put in at the last service (if not, ask your dealer and tell him to put a label in next time). Cheers, Uwe

POST 3Original post

I'm pretty sure that I saw in the manual that you can top up with any weight synthetic but to use all of the same weight during full oil changes.

POST 4Original post

Yes, you can mix viscosities - that's how the oil co's do it, except they call it "blending". High tech term, there.... J

POST 5Original post

As others have said, you can mix oils approved by Porsche. This is stated in the latest TSB for approved oils issued by Porsche 5/23/03. Jeff

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