Rennlist

Incorrect Oil Weight

Add to repair workspace

New repair projectOpen repair workspace

Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHIncorrect Oil Weight

Leading reported evidence

Use castrol syntech as it has more zddp

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
5W-40 in the winter and 5W-50 in the summer for me, and I use Castrol Syntech as it has more ZDDP.
Original post Read captured discussion
Incorrect Oil Weight

Frequently discussed work

Replace 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
Assuming the oil was just changed, you needn't replace the filter.
Original post Read captured discussion
Incorrect Oil Weight

Read full discussion summary

Leading evidence: 'Use castrol syntech as it has more zddp' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace filter' (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 · 8 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace filter

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
Assuming the oil was just changed, you needn't replace the filter.
Original post Read captured discussion
Incorrect Oil Weight

Replace oil

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
Never run anything but Xw-40...Have him change the oil.
Original post Read captured discussion
Incorrect Oil Weight

Replace with 5-40 (i'm

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
Just drain the 10-30, replace with 5-40 (I'm with Dharn55 on not using 0-40), and you're good to go.
Original post Read captured discussion
Incorrect Oil Weight

Use 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
0w, 5w or 10w but always use the -40.
Original post Read captured discussion
Incorrect Oil Weight

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.

Replace 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
Assuming the oil was just changed, you needn't replace the filter.
Original post Read captured discussion
Incorrect Oil Weight

Replace 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
Never run anything but Xw-40...Have him change the oil.
Original post Read captured discussion
Incorrect Oil Weight

Replace with 5-40 (i'm

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
Just drain the 10-30, replace with 5-40 (I'm with Dharn55 on not using 0-40), and you're good to go.
Original post Read captured discussion
Incorrect Oil Weight

Use 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
0w, 5w or 10w but always use the -40.
Original post Read captured discussion
Incorrect Oil Weight

Use castrol syntech as it has more zddp

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
5W-40 in the winter and 5W-50 in the summer for me, and I use Castrol Syntech as it has more ZDDP.
Original post Read captured discussion
Incorrect Oil Weight

Use too thin an 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
Whilst the 30 might be okay, I personally wouldn't take the risk with a $20K engine using too thin an oil.
Original post Read captured discussion
Incorrect Oil Weight

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.

8 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: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My father put 10w-30 Mobil 1 Synthetic instead of the approved 10w-40 in his 01' c2. Could this cause any harm to his engine?

POST 2Original post

I would not run 10W in cold weather or 30 in really hot weather. But neither is likely to cause any real harm in moderate temps. If you have a 02+ with VarioCamPlus you might get some problems with the lifters with the 10W. By the way I think the approved oil is actually 0W-40, but I never run 0W-40. 5W-40 in the winter and 5W-50 in the summer for me, and I use Castrol Syntech as it has more ZDDP.

POST 3Original post

whats with the oil threads lately..... remember the days of disregard threads.

POST 4Original post

Quotes source post: 8554688

Cars are coming out from winter storage maybe?

POST 5Original post

If it were me, I'd dump the 10-30 and replace it. The 30 is a bit thin for warmer driving--and the Sacramento area is definitely "warmer" during the summer (I used to live in Davis, right next door). Plus the Mobil 1 seems to "thin out" as it ages, and the 30 will become a 25 or ??? Whilst the 30 might be okay, I personally wouldn't take the risk with a $20K engine using too thin an oil. Assuming the oil was just changed, you needn't replace the filter. Just drain the 10-30, replace with 5-40 (I'm with Dharn55 on not using 0-40), and you're good to go. Easy DIY job.

POST 6 / ORIGINAL POSTEROriginal post

Quotes source post: 8554671

Sorry I was in a hurry when I posted the thread! Thanks for the input!

POST 7Original post

5W-50 in the summer... Castrol.... Hmmm...

POST 8Original post

Never run anything but Xw-40...Have him change the oil. 0w, 5w or 10w but always use the -40.

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