Discussion
the general consensus from prior discussions, IIRC, was that the age of the fuel probably has more relevance than the RON number i.e fresh 97ron beats optimax thats been in the fuel storage bunker for a few months. dont know how anyone would know this but I'm sure EVO did a test a while back and drew that conclusion.
I always use Optimax 98RON but on the two occasions ive had to use BP ultimate 97RON ive had the impression the car ran at least as well, if not slightly better (and the ecu chip is optimised for 98ron). so on balance i dont think it matters much, though dropping to 95RON will.
(filled up with optimax 2 weeks ago at 98p/L, just filled with BP ultimate 104p/L
)
I always use Optimax 98RON but on the two occasions ive had to use BP ultimate 97RON ive had the impression the car ran at least as well, if not slightly better (and the ecu chip is optimised for 98ron). so on balance i dont think it matters much, though dropping to 95RON will.
(filled up with optimax 2 weeks ago at 98p/L, just filled with BP ultimate 104p/L
)I'd just drive carefully if your woried, i think it matters more in turbo engines to avoid detonation, the higher the RON the cooler it burns or something, i wouldn't worry, if you'd stuck 91 RON in and drove it like you'd stollen it you might have cause for concern, but one tank of 97 isn't going to matter at all IMO
I wouldn't worry about if full stop and drive as you would normally I really don't think it will do any damage what so ever.
Modern ECUs are designed to adjust for the quality of the fuel that is being burnt, it is conceivable that using a really high octane fuel in a car that wasn't desgined for it may have long term effects due to the higher temperatures generated, but in most cases you will just waste your money on more expensive fuel.
I recently heard it said on some program, possibly Fifth Gear, that porshce stated that it didn't matter what fuel you put in the, ECU will simply adjust the performance so that it would be same regardless what you put in it.
This may fly in the face of what some experience with optimax etc, but I really don't suppose it makes a huge or noticable difference, depending on your car of course.
Modern ECUs are designed to adjust for the quality of the fuel that is being burnt, it is conceivable that using a really high octane fuel in a car that wasn't desgined for it may have long term effects due to the higher temperatures generated, but in most cases you will just waste your money on more expensive fuel.
I recently heard it said on some program, possibly Fifth Gear, that porshce stated that it didn't matter what fuel you put in the, ECU will simply adjust the performance so that it would be same regardless what you put in it.
This may fly in the face of what some experience with optimax etc, but I really don't suppose it makes a huge or noticable difference, depending on your car of course.
I've done a bit of checking into this and agree with Supersport.. I've been running on 95 as that's all that's available in Ireland unfortunately. I was concerned about it to begin with , but having got a couple of 'expert' opinions , I've relaxed a bit... Hadn't thought about whether it would have a detrimental effect on a blown engine though ... Interesting .. any more info/opinions on this??
jonny996 said:
Thanks ballcock, I have the same car as you all be it silver, so if your runs happily then I am happy. I have just picked mine up and it fast enough at the moment, but in the future how knows. have you done anything to your?
Still bog standard jonny .. I do notice that bods are talking mods more and more in recent times .. It's all a bit too USA for me!
Having said all that , an exhaust is a 'must do' in the near future. Looking at 'remus' products at the mo.. they give a lifetime guarantee that includes the baffles.
To be honest I wouldn't worry. I always use Opti as it is 98RON and that's what the fuel flap says, and it's the only 98 available in the UK. I have used Tesco 99RON once and it seemed good stuff, but I worry about the implications of bioethanol they put in it.
Ulimate and Excellium are 97RON only, but better than boggo 95.
To be honest, wot ballcock sed. Modern engines adjust themselves thousands of times a second to make sure nothing bad happens. Just drive and enjoy. I would worry more about WHERE I buy the fuel, as what WILL cause damage is a dodgy batch full of crud from a dirty tank. This is why I don't buy from small indy garages.
>> Edited by Vesuvius 996 on Wednesday 3rd May 12:22
Ulimate and Excellium are 97RON only, but better than boggo 95.
To be honest, wot ballcock sed. Modern engines adjust themselves thousands of times a second to make sure nothing bad happens. Just drive and enjoy. I would worry more about WHERE I buy the fuel, as what WILL cause damage is a dodgy batch full of crud from a dirty tank. This is why I don't buy from small indy garages.
>> Edited by Vesuvius 996 on Wednesday 3rd May 12:22
To confirm the point I have just found this on the PCGB forum with reference to the new BP mega expensive fuel 102RON!
"Porsche spokesman Andrew Davis said "The fuel will not increase power in a Porsche, though it may fractionally reduce fuel consumption and burn more cleanly. Our engines have a maximum power output. If you put different fuel in, the engine management system won't allow the engine to produce more power. All our cars will run on standard 95 RON unleaded, although we advise 98 RON for some of the turbocharged cars"
www.porscheclubgbforum.com/tm.asp?m=200929
"Porsche spokesman Andrew Davis said "The fuel will not increase power in a Porsche, though it may fractionally reduce fuel consumption and burn more cleanly. Our engines have a maximum power output. If you put different fuel in, the engine management system won't allow the engine to produce more power. All our cars will run on standard 95 RON unleaded, although we advise 98 RON for some of the turbocharged cars"
www.porscheclubgbforum.com/tm.asp?m=200929
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