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Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

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

Discussion summary

YOUR RESEARCHKendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Leading reported evidence

Replace oil

Suggestion or failed attempt

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 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

I wonder, however, if, assuming you change oil after every track event, the Kendall might not provide better protection in racing conditions - particularly for the camshafts.

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60
Read full discussion summary

Leading evidence: 'Replace oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace oil' (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 · 0 partial discussions

Compare 4 other evidence results

Use has quite something

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 · Original poster

Sometimes, perhaps, of course, not in the instance of Porsche, approval of oils for street use has quite something to do with gas mileage and, frankly, politics.

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use mobil one 15w-50, and a local shop

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

The Boxster people I know who track their car use Mobil One 15W-50, and a local shop which races GT3s also uses it.

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use which one

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 · Original poster

And for street use which one?

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use would you

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 · Original poster

For track use, would you use Kendall GT-1 20W50, a mineral based oil, or Mobil 1 15W50, a synthetic oil, or Castrol RS 10W60, a synthetic oil, and why?

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60
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 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 · Original poster

I wonder, however, if, assuming you change oil after every track event, the Kendall might not provide better protection in racing conditions - particularly for the camshafts.

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use has quite something

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

Sometimes, perhaps, of course, not in the instance of Porsche, approval of oils for street use has quite something to do with gas mileage and, frankly, politics.

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use mobil one 15w-50, and a local shop

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

The Boxster people I know who track their car use Mobil One 15W-50, and a local shop which races GT3s also uses it.

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use which one

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

And for street use which one?

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60

Use would you

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

For track use, would you use Kendall GT-1 20W50, a mineral based oil, or Mobil 1 15W50, a synthetic oil, or Castrol RS 10W60, a synthetic oil, and why?

Original post Read captured discussion
Kendall GT-1 20W50 vs. Mobil 1 15W50 vs. Castrol RS 10W60
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.

  • 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

For track use, would you use Kendall GT-1 20W50, a mineral based oil, or Mobil 1 15W50, a synthetic oil, or Castrol RS 10W60, a synthetic oil, and why? And for street use which one?

POST 2Original post

It may not matter to you, but the only mineral oil approved by Porsche for a 996 was Exxon/Superflow Supreme Special 15W-40. When the new list came out last year it was off the list and only a few fully synthetic oils are now approved. The highest viscosity approved oil is Castrol 5W-50. The Boxster people I know who track their car use Mobil One 15W-50, and a local shop which races GT3s also uses it. But it is no longer on the list. Jeff

POST 3 / ORIGINAL POSTEROriginal post

Sometimes, perhaps, of course, not in the instance of Porsche, approval of oils for street use has quite something to do with gas mileage and, frankly, politics. I wonder, however, if, assuming you change oil after every track event, the Kendall might not provide better protection in racing conditions - particularly for the camshafts.

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