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Discussion summary
YOUR RESEARCHPorsche Classic Fuel Additive - Page 1 - 911/Carrera GT - PistonHeads UK
Leading reported evidence
Recommend by porsche called optimol, made by castrol
Suggestion or failed attempt
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Discussions that contain suggestions
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Suggestion
Personally I've never had a problem using copper slip on steel bolts into aluminium, but there is an "aluminium slip" similar product, also an assembly compound recommended by Porsche called Optimol, made by Castrol.
Leading evidence: 'Recommend by porsche called optimol, made by castrol' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend by porsche called optimol, made by castrol' (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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Discussions that contain suggestions
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Suggestion
Really not a good idea at all, copper grease can fuse steel and ally together even quicker, use aluminium anti seize, but not copper.
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
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Suggestion
Personally I've never had a problem using copper slip on steel bolts into aluminium, but there is an "aluminium slip" similar product, also an assembly compound recommended by Porsche called Optimol, made by Castrol.
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
I tend to use Forte additives, but when it comes to Porsche I think a Porsche approved product is wise, just because they tend to mix metals a lot more than other manufacturers do, so better to play it safe.
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Recommend by porsche called optimol, made by castrol
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
Personally I've never had a problem using copper slip on steel bolts into aluminium, but there is an "aluminium slip" similar product, also an assembly compound recommended by Porsche called Optimol, made by Castrol.
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
Personally I've never had a problem using copper slip on steel bolts into aluminium, but there is an "aluminium slip" similar product, also an assembly compound recommended by Porsche called Optimol, made by Castrol.
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 tend to use Forte additives, but when it comes to Porsche I think a Porsche approved product is wise, just because they tend to mix metals a lot more than other manufacturers do, so better to play it safe.
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.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 1 discussions
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0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Anyone started using this for cars they’re laying up for winter?
https://www.porsche.com/uk/accessoriesandservice/c...
I’ve not bothered until now, car is SORN’d from November to April, but maybe it could be worthwhile as she gets older? Decent fuel is supposed to be good for 6 months minimum I’m told but this stuff might be good for protecting fuel lines and the tank allegedly.
Thoughts?
Shell has around 3-4% ethanol, I would just put that in, that is good for 6 months.
Of course, if you put 95ron in, it will be 10% and that only has a shelf life of around 3-4 months, that is when the additive makes sense.
Edit: Talking Shell super of course. I would never put 95 in any Porsche.
Cheers Ed. Yeah I’m not worried about the petrol going off - but the additive apparently has additional anti corrosion properties….
Effect of the additive
The fuel additive forms a protective layer between metal and fuel. This is a gentle process that protects the tank and fuel system against corrosion and deposits – even the areas that are not covered by the fuel, such as the air zone in the fuel tank. Special molecules in the additive form a corrosion protection layer throughout the fuel system, thus ensuring an optimal level of protection. Condensation that has already formed in the fuel system is bonded by the chemical elements and does not cause any damage.
The additive dissolves deposits and adhesions that have already been formed. We were able to prove this in several long-term tests in collaboration with the Porsche Development Centre in Weissach. A number of tests to determine the compatibility of the additive with materials that form Porsche Classic Genuine Parts were also successfully carried out.
[Porsche]
Yeah sorry, I was mentioning Shell as they have similar in their super unleaded.
I think that adding some of the Porsche stuff would be a good idea too though, especially if it is a keeper.
I tend to use Forte additives, but when it comes to Porsche I think a Porsche approved product is wise, just because they tend to mix metals a lot more than other manufacturers do, so better to play it safe.
Thinking more about suspension and body rather than fuel tank, but see people saying they put copper grease on steel bolts going into ally wheel carriers etc. Really not a good idea at all, copper grease can fuse steel and ally together even quicker, use aluminium anti seize, but not copper.
Edited by Ed.Neumann on Saturday 28th December 10:41
Personally I've never had a problem using copper slip on steel bolts into aluminium, but there is an "aluminium slip" similar product, also an assembly compound recommended by Porsche called Optimol, made by Castrol. I use this on wheel bolts amoung other things
This is a source reference. Confirm exact model applicability in the original material.
