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Gas

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

Discussion summary

YOUR RESEARCHGas

Leading reported evidence

Disconnect negative cable

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas
Read full discussion summary

Leading evidence: 'Disconnect negative cable' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect negative cable' (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 · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Fill tank

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas

Recommend higher octane rating, sticker

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

Porsche here recommend the higher octane rating, sticker under fuel lid, I like Shell Optimax which has apparently extra good additives

Original post Read captured discussion
Gas

Reset computer by

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas

Run on 94

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

On the flip side, you will not gain any power running on 94.

Original post Read captured discussion
Gas
Frequently discussed actions (10)

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

Disconnect negative cable

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas

Fill tank

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas

Recommend higher octane rating, sticker

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

Porsche here recommend the higher octane rating, sticker under fuel lid, I like Shell Optimax which has apparently extra good additives

Original post Read captured discussion
Gas

Reset computer by

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas

Run on 94

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

On the flip side, you will not gain any power running on 94.

Original post Read captured discussion
Gas

Run on lower octane (even 87)

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

I doubt you would "harm" the car running on lower octane (even 87).

Original post Read captured discussion
Gas

Run richer

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

I've heard the case persuasively made that relying on the knock sensor over time, allowing the car to run richer and with the timing retarded, is hard on a number of components.

Original post Read captured discussion
Gas

Test would be

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

Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes.

Original post Read captured discussion
Gas

Use higher octane fuel

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

If your engine does not knock and therefore retard the timing, you will see no benefit using a higher octane fuel.

Original post Read captured discussion
Gas

Use lower grade

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

Does anyone see any differences between using 91, 93 or 94 octane gas or knwo about any long term consequences for using the lower grade.

Original post Read captured discussion
Gas
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.

6 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Does anyone see any differences between using 91, 93 or 94 octane gas or knwo about any long term consequences for using the lower grade. I have a standard 2000 911 engine. Thanks

POST 2Original post

I doubt you would "harm" the car running on lower octane (even 87). However, the ECU will probably retard the timing to avoid "knock" so you will make less power. On the flip side, you will not gain any power running on 94. 93 is your best bet if it is available. If not (like California) 91 will work ok.

POST 4Original post

Let me add to this question, if I may: I've witnessed this subject hotly debated on other boards for other cars. I've heard the case persuasively made that relying on the knock sensor over time, allowing the car to run richer and with the timing retarded, is hard on a number of components. The catalysts are often cited as victims. Also, is it not true that the rated power of a 996 is given for 93 or 94 (can't recall which), and therefore running it even on 91 octane premium would cost some power? Would love a Porsche perspective on this...

POST 5Original post

If your engine does not knock and therefore retard the timing, you will see no benefit using a higher octane fuel. Simple test would be to fill your tank with 93 and reset your computer by disconnecting the negative cable for a few minutes. Then drivive the car around for a few miles, hook up your scanner and log your timing for a few hard runs up to redline. After you use up all the 93 gas, fill up with 91 and reapeat. If you see no difference, the 91 is fine for your car. Do the test in similar climate.

POST 6Original post

With the high compression ratios of our engines (3.6 is 11.3:1) significant retardation should take place (meaning some power loss) Porsche here recommend the higher octane rating, sticker under fuel lid, I like Shell Optimax which has apparently extra good additives

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