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Engine additive

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

Discussion summary

YOUR RESEARCHEngine additive

Leading reported evidence

Replace between 3k and 5k miles regularly

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 · Original poster

Thanks for the reply, my car is a DD and the oil is changed between 3K and 5K miles regularly.

Engine additive
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Leading evidence: 'Replace between 3k and 5k miles regularly' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace between 3k and 5k miles regularly' (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.

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1 matching discussions · 8 captured posts examined · 0 partial discussions

Compare 2 other evidence results

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

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

Change the oil.

Engine additive

Use swepco 502 oil improver

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

Some techs advise for cars that are not run but infrequently to use Swepco 502 oil improver.

Engine additive
Frequently discussed actions (3)

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

Replace between 3k and 5k miles regularly

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

Thanks for the reply, my car is a DD and the oil is changed between 3K and 5K miles regularly.

Engine additive

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

Change the oil.

Engine additive

Use swepco 502 oil improver

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

Some techs advise for cars that are not run but infrequently to use Swepco 502 oil improver.

Engine additive
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.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

I tried this a couple of times in my engines and noticed no difference in startup noise but my cars get driven very frequently.

No unique explicit quoted action; no causal link assigned

Generation: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am noticing some valve noise and am considering an additive at the next oil change. Any suggestions for additive Advice much appreciated

POST 2Original post

Quotes source post: 10626724

Change the oil. Fresh oil quiets an engine. Oil with miles gets diluted with unburned gasoline and water. The oil becomes less viscous and the engine becomes noisier. The only way to remove this fluid contamination is to drain the oil and replace it with fresh oil. Some techs advise for cars that are not run but infrequently to use Swepco 502 oil improver. I tried this a couple of times in my engines and noticed no difference in startup noise but my cars get driven very frequently.

POST 3 / ORIGINAL POSTEROriginal post

Thanks for the reply, my car is a DD and the oil is changed between 3K and 5K miles regularly. I am just trying to stay a half a step ahead of the game

POST 4Original post

Quotes source post: 10628282

You are already doing what you can to avoid any serious engine trouble and accelerated or premature engine wear. About the only thing you do in addition would be to sell the car. Relax. Continue to enjoy the car and continue to service it as you have been. While there is no guarantee the engine will live to a ripe old age and during its life deliver trouble free service the odds are in its favor. And yours.

POST 5 / ORIGINAL POSTEROriginal post

Thanks Mac, you are correct, just trying to minimize future difficulties. Your words are comforting

POST 6Original post

I would take a look at BG MOA. It has a rather staunch following, but I've never used it. I do use Lubro Moly MOS2 in my other cars and they quieter. Didn't use in the Porsche however.

POST 7Original post

I would be worried if I DIDN'T get some lifter noise on startup. A little valve clatter, a little chain slap, thats just Brunhilde (yes her name is Brunhilde) saying she's ready to go!

POST 8Original post

If you are thinking of an additive to quieten an engine then its time to think about having the engine stripped and worked on. Unless you want to play the ostrich and bury your head in the sand because that is what you are doing. I am not saying that you are but if you were selling the car, would you put in the additive and not tell the new buyer? Either get the necessary work done on the engine or live with the sound. Hey that's O I M H O however. Peace bro.

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