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oil ambient temperature

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHoil ambient temperature

Leading reported evidence

Use 0-40 in winter, 5-40 or 5-50 during warmer months

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
I use 0-40 in winter, 5-40 or 5-50 during warmer months.
Original post Read captured discussion
oil ambient temperature

Frequently discussed work

Replace frequently (seems more often than the approved list)

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
Porsche also lists approved oils, but the producers' formulations change frequently (seems more often than the approved list).
Original post Read captured discussion
oil ambient temperature

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Leading evidence: 'Use 0-40 in winter, 5-40 or 5-50 during warmer months' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace frequently (seems more often than the approved list)' (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 · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace frequently (seems more often than the approved list)

Suggestion or failed attempt

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
Porsche also lists approved oils, but the producers' formulations change frequently (seems more often than the approved list).
Original post Read captured discussion
oil ambient temperature

Run either 0-40 or 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

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
From what I have picked up on this forum, most are running either 0-40 or 5-40.
Original post Read captured discussion
oil ambient temperature

Run engine hard in hot weather

Suggestion or failed attempt

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 would not run higher than 5-40 unless my oil pressure was low or I was planning to run the engine hard in hot weather.
Original post Read captured discussion
oil ambient temperature

Use 0w40 or 5w40 living in chicago

Suggestion or failed attempt

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
Simply want to know if I should be using 0w40 or 5w40 living in Chicago.
Original post Read captured discussion
oil ambient temperature

Frequently discussed actions (5)

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

Replace frequently (seems more often than the approved list)

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
Porsche also lists approved oils, but the producers' formulations change frequently (seems more often than the approved list).
Original post Read captured discussion
oil ambient temperature

Run either 0-40 or 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
From what I have picked up on this forum, most are running either 0-40 or 5-40.
Original post Read captured discussion
oil ambient temperature

Run engine hard in hot weather

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 would not run higher than 5-40 unless my oil pressure was low or I was planning to run the engine hard in hot weather.
Original post Read captured discussion
oil ambient temperature

Use 0-40 in winter, 5-40 or 5-50 during warmer months

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
I use 0-40 in winter, 5-40 or 5-50 during warmer months.
Original post Read captured discussion
oil ambient temperature

Use 0w40 or 5w40 living in chicago

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
Simply want to know if I should be using 0w40 or 5w40 living in Chicago.
Original post Read captured discussion
oil ambient temperature

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.

6 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: 20261026T213932Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Have been searching quite a bit but have not found a clear cut answer....also not starting an oil thread Simply want to know if I should be using 0w40 or 5w40 living in Chicago. Car is parked outside. Thanks!

POST 2Original post

I use 0-40 in winter, 5-40 or 5-50 during warmer months.

POST 3 / ORIGINAL POSTEROriginal post

I have an 80s BMW where I make seasonal switches. Any harm in just running one or the other or is it not recommended?

POST 4Original post

There's a temperature reference in the owner's manual. Porsche also lists approved oils, but the producers' formulations change frequently (seems more often than the approved list). There's a wide variation in opinions on this, but if I was limited to a single oil, I'd opt for the lower number for normal driving.

POST 5Original post

From what I have picked up on this forum, most are running either 0-40 or 5-40. I believe Porsche's recommendation is 0-40. If you do a lot of cold starts, either in summer or winter, the lower number will be more helpful to the engine. I would not run higher than 5-40 unless my oil pressure was low or I was planning to run the engine hard in hot weather.

POST 6Original post

The Porsche Approved list is updated at least annually and approval validity for individual oils is granted for a period not exceeding 2-3 years. There 163-ish oils on the list 147x 5w-40, 14x 0w-40 and 2x 5w-50 Porsche recommendations on ambient temperatures: Your choice.

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