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Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

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YOUR RESEARCHEnforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Leading reported evidence

Disconnect & re-connecting the battery forces it

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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 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
However disconnecting & re-connecting the battery forces it to go into 'learn-mode' - I'm not sure if the same is true for a 993; however it's probably a quick enough test short of booking it in for diagnostics?
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

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Leading evidence: 'Disconnect & re-connecting the battery forces it' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect & re-connecting the battery forces it' (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 · 6 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Reset 993 ecu about a year ago here

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Although apparently that's not possible - I queried how to reset a 993 ecu about a year ago here on PH), was told I should buy a durametric tester.
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Reset so it'll expect the best fuel and perform accordingly

Suggestion or failed attempt

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
The car will learn the higher grade fuel, but over a period of time, if you'd prefer to have the adaptions reset so it'll expect the best fuel and perform accordingly then get yourself to somewhere with full Porsche diagnostics.
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Suggestion
The car will learn the higher grade fuel, but over a period of time, if you'd prefer to have the adaptions reset so it'll expect the best fuel and perform accordingly then get yourself to somewhere with full Porsche diagnostics.
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Test short of booking it in

Suggestion or failed attempt

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
However disconnecting & re-connecting the battery forces it to go into 'learn-mode' - I'm not sure if the same is true for a 993; however it's probably a quick enough test short of booking it in for diagnostics?
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Use 99 not 98 (shell or tesco is 99)

Suggestion or failed attempt

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
Firstly, use 99 not 98 (Shell or Tesco is 99).
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Suggestion
Firstly, use 99 not 98 (Shell or Tesco is 99).
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

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.

Disconnect & re-connecting the battery forces it

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
However disconnecting & re-connecting the battery forces it to go into 'learn-mode' - I'm not sure if the same is true for a 993; however it's probably a quick enough test short of booking it in for diagnostics?
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Reset 993 ecu about a year ago here

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
Although apparently that's not possible - I queried how to reset a 993 ecu about a year ago here on PH), was told I should buy a durametric tester.
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Reset so it'll expect the best fuel and perform accordingly

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
The car will learn the higher grade fuel, but over a period of time, if you'd prefer to have the adaptions reset so it'll expect the best fuel and perform accordingly then get yourself to somewhere with full Porsche diagnostics.
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Suggestion
The car will learn the higher grade fuel, but over a period of time, if you'd prefer to have the adaptions reset so it'll expect the best fuel and perform accordingly then get yourself to somewhere with full Porsche diagnostics.
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Test short of booking it in

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
However disconnecting & re-connecting the battery forces it to go into 'learn-mode' - I'm not sure if the same is true for a 993; however it's probably a quick enough test short of booking it in for diagnostics?
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Use 99 not 98 (shell or tesco is 99)

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
Firstly, use 99 not 98 (Shell or Tesco is 99).
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

Suggestion
Firstly, use 99 not 98 (Shell or Tesco is 99).
Original post Read captured discussion
Enforced use of 95RON, what to do when I go back to 98+RON? - Page 1 - 911/Carrera GT - PistonHeads UK

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.

PistonHeads: 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: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Currently in Italy with my 993 and the vast majority of petrol stations only have 95RON fuel. When I get back to civilisation ( ) and have 98 available, do I need to do any kind of ECU reset or similar so the engine can get the full benefit of 98 again? I ask as I seem to recall that for 996s an ecu reset was required in order for the engine to make full us of the good stuff as it would not "unlearn"....

POST 2Original post

Firstly, use 99 not 98 (Shell or Tesco is 99). The car will learn the higher grade fuel, but over a period of time, if you'd prefer to have the adaptions reset so it'll expect the best fuel and perform accordingly then get yourself to somewhere with full Porsche diagnostics.

POST 3 / ORIGINAL POSTEROriginal post

thegoose said: Firstly, use 99 not 98 (Shell or Tesco is 99). The car will learn the higher grade fuel, but over a period of time, if you'd prefer to have the adaptions reset so it'll expect the best fuel and perform accordingly then get yourself to somewhere with full Porsche diagnostics. Ta. What period of time are we talking about? 1 tank? 5 tanks? 1k miles?

POST 4Original post

There's something a bit odd you can do with a 996 to "unlearn" the ECU. I think this involves turning the ignition on for 20 seconds but not firing up the engine. I swear I have not imagined this...

POST 5 / ORIGINAL POSTEROriginal post

rob.kellock said: There's something a bit odd you can do with a 996 to "unlearn" the ECU. I think this involves turning the ignition on for 20 seconds but not firing up the engine. I swear I have not imagined this... Yup, I recall that. Although apparently that's not possible - I queried how to reset a 993 ecu about a year ago here on PH), was told I should buy a durametric tester.

POST 6Original post

A 964 will retart the ignition on lower fuel grades, it then takes a long time for that to reset. However disconnecting & re-connecting the battery forces it to go into 'learn-mode' - I'm not sure if the same is true for a 993; however it's probably a quick enough test short of booking it in for diagnostics?

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