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Planet-9

Correct coolant for 987.2 2.9L Boxster

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Original source
3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCorrect coolant for 987.2 2.9L Boxster

Leading reported evidence

Use zerex g-40

Performed · outcome unconfirmed

No successful repair reported for this finding.

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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

I use the Zerex G-40.

Original post Read captured discussion
Correct coolant for 987.2 2.9L Boxster
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Leading evidence: 'Use zerex g-40' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'same thing)' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Use zerex g-40' (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 · 3 captured posts examined · 1 partial discussions

Compare 1 other evidence results

same thing)

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.

Suspected cause

43305 (black bottle, black label, probably the same thing).

Original post Read captured discussion
Correct coolant for 987.2 2.9L Boxster
Frequently discussed actions (1)

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

Use zerex g-40

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 the Zerex G-40.

Original post Read captured discussion
Correct coolant for 987.2 2.9L Boxster
Reported and suspected causes (1)

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

same thing)

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

43305 (black bottle, black label, probably the same thing).

Original post Read captured discussion
Correct coolant for 987.2 2.9L Boxster
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.

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

  • Planet-9: 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: 20261026T133652Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Coolant in my 987.2 2.9 is low, and I'm trying to figure out which type it needs. The owner's manual is lacking in that kind of info. According to Suncoast parts , it's Porsche 4330105 (black bottle, white label). According to Pelican Parts it's Porsche 43305 (black bottle, black label, probably the same thing). Pelican Parts also offers Zerex G-40 as an OEM supplier. I asked Zerex ( Valvoline ) if G-40 is appropriate for my 2012 and they said it was for 2014+, but for 2012 "G-12 was covered by Dexcool " (exact quote). Anyone able to shed any light on what the truth is here?

POST 2Original post

I use the Zerex G-40. My car is a 987.1 , but I'm sure the cooling system is the same. The key is that the coolant has Si-Organic Acid Technology. I got mine at the local NAPA store and it's much cheaper than the Porsche -branded stuff.

POST 3Original post

If I can trust the 987.2 service manual, the stock coolant is Total Glacelf Auto Supra. This is a silicate-free OAT coolant. I use Prestone in the yellow jug, which is basically the same stuff. It's essentially Dex-Cool. But I haven’t gotten the impression these cars are very picky about coolant chemistry. More info here: Coolant/Antifreeze

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