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Used Oil Analysis

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHUsed Oil Analysis

Leading reported evidence

Use redline si-1 fuel system cleaner

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
For high fuel dilution use the Redline SI-1 fuel system cleaner.
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Used Oil Analysis

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Leading evidence: 'Use redline si-1 fuel system cleaner' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use redline si-1 fuel system cleaner' (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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1 matching discussions · 3 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Use redline si-1 fuel system cleaner

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
For high fuel dilution use the Redline SI-1 fuel system cleaner.
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Used Oil Analysis

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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.

3 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Looking at an early C2. Analysis shows high fuel % (dilution), but trending down (3+% to 0.5). Silicon spiked on this report, but no accompanying aluminum or other metals. Car drives and sounds fine. Should I be concerned? Couldn�t find info on just elevated Silicon, or elevated Silicon post fuel dilution.

POST 2Original post

For high fuel dilution use the Redline SI-1 fuel system cleaner. It is by far the best product I have used and made a significant improvement in my fuel dilution readings. I was able to get it down from about 1.31 which was OK to .52 within a single OCI.

POST 3Original post

High fuel dilution can be due to leaky injectors, a lot of very short trips, backing the car out of the garage and then putting it back in, that sort of thing; any type of use that doesn't give the fuel time to evaporate out of the oil. It can contribute to washing down the cylinder walls and accelerating bore scoring. High silicon can be from RTV. Did someone R&R the sump or anything like that recently? It can also be from dust ingestion. Does the car have an aftermarket intake or air filter?

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