996TT - filling up
Discussion
kiko said:
How can anyone who has a 996 Turbo use 95 to save a few quid?
It depends though, if you plod through daily traffic and don't generally get to drive it any quicker than you would, say, a Mini, then why wouldn't you, assuming there was no damage/harm done by using 95 RON?
A fiver a tank or whatever the difference is all adds up IMHO (says the man who keeps chucking 98 RON in his Boxster because he keeps reading how they don't "like" lower octane).
nick_968 said:
It always amazes me the misinterpretation that occurs on these kind of threads! Its not about skimping on fuel costs when you can afford a TT. Its about knowing what you can get away with if super is not available!! Also the TT will advance or retard the timing accordingly for whatever fuel you choose to use via knock sensing, there is no requirement to use super due to increased pressure in the cylinders otherwise loads would have gone bang by now. Take Lonmans car for example, this has sat at 200+ mph for extended periods of time, something very few cars have done, and the GT2 being in a higher state of tune than a TT and it didnt go bang or suffer any decrease in performance, all this whilst running on Yankee petrol which in many cases is not as good as our 95. Porsche would not release a car that couldnt run safely on 95. They simply recommend that for optimum performance you use super.
Excuse me but I believe that you are the one misinterpreting the original post, if you read the post you'll notice the gentleman clearly mentioned the use of 95 on daily basis.
hutchingsp said:
kiko said:
How can anyone who has a 996 Turbo use 95 to save a few quid?
It depends though, if you plod through daily traffic and don't generally get to drive it any quicker than you would, say, a Mini, then why wouldn't you, assuming there was no damage/harm done by using 95 RON?
A fiver a tank or whatever the difference is all adds up IMHO (says the man who keeps chucking 98 RON in his Boxster because he keeps reading how they don't "like" lower octane).
1)Contemporary Porsche ECU's have a function called adaptative management which adapts the timing, fuel, throttle response, even peak boost (and on Tip's the box's ECU does the same) to your driving style so if you consistently run 95 you'll have to run a full tank or disconnect the battery to get the performance.
2)When analysing the engine management with a PST2 there alot of data available (overrev 1, overrev 2, hours work, mileage, LTFT, STFT, error codes, etc) and one of them is a knock sensor counter which is not flagged with 98 but it knocks back timing on 95 so in case of a warranty claim they can see you haven't been using the correct fuel and you can guess the rest.
3)This is a very personal point of view but I reckon its valid anyway, why the hell do some of you guys go cheap on your Turbos and I don't mean the fuel, I mean tuning, servicing, etc..
Why would you use 95 if it says 98 ON THE TIN!!! My 996 Turbo is my pride and joy and I wouldn't be at ease driving it if I new I had 95 on the tank.
kiko said:
2)When analysing the engine management with a PST2 there alot of data available (overrev 1, overrev 2, hours work, mileage, LTFT, STFT, error codes, etc) and one of them is a knock sensor counter which is not flagged with 98 but it knocks back timing on 95 so in case of a warranty claim they can see you haven't been using the correct fuel and you can guess the rest.
I don't believe there's been any cases of Porsche refusing to honor a warranty due to using 95RON fuel. I believe starting rumors to the contrary is unhelpful.
Petrol quality varies with every tank you put in. It isn't some textbook scientific standard. If you choose to put std 95RON fuel in you will have no problems at all. You'll just have a little less power, which many people find means a little less fuel economy, as mentioned in this thread.
kiko said:
nick_968 said:
It always amazes me the misinterpretation that occurs on these kind of threads! Its not about skimping on fuel costs when you can afford a TT. Its about knowing what you can get away with if super is not available!! Also the TT will advance or retard the timing accordingly for whatever fuel you choose to use via knock sensing, there is no requirement to use super due to increased pressure in the cylinders otherwise loads would have gone bang by now. Take Lonmans car for example, this has sat at 200+ mph for extended periods of time, something very few cars have done, and the GT2 being in a higher state of tune than a TT and it didnt go bang or suffer any decrease in performance, all this whilst running on Yankee petrol which in many cases is not as good as our 95. Porsche would not release a car that couldnt run safely on 95. They simply recommend that for optimum performance you use super.
Excuse me but I believe that you are the one misinterpreting the original post, if you read the post you'll notice the gentleman clearly mentioned the use of 95 on daily basis.
Sorry but I interpreted it as a request for advice and yours is clearly flawed!
willdew said:
kiko said:
2)When analysing the engine management with a PST2 there alot of data available (overrev 1, overrev 2, hours work, mileage, LTFT, STFT, error codes, etc) and one of them is a knock sensor counter which is not flagged with 98 but it knocks back timing on 95 so in case of a warranty claim they can see you haven't been using the correct fuel and you can guess the rest.
I don't believe there's been any cases of Porsche refusing to honor a warranty due to using 95RON fuel. I believe starting rumors to the contrary is unhelpful.
Petrol quality varies with every tank you put in. It isn't some textbook scientific standard. If you choose to put std 95RON fuel in you will have no problems at all. You'll just have a little less power, which many people find means a little less fuel economy, as mentioned in this thread.
Well, if you believe I'm starting a rumor its your problem specially if you keep using 95 and if you have your car under warranty. I've seen one customer being paid only half based JUST on that and another being completely void based on that and class 2 overrev. Go figure...
kiko said:
willdew said:
kiko said:
2)When analysing the engine management with a PST2 there alot of data available (overrev 1, overrev 2, hours work, mileage, LTFT, STFT, error codes, etc) and one of them is a knock sensor counter which is not flagged with 98 but it knocks back timing on 95 so in case of a warranty claim they can see you haven't been using the correct fuel and you can guess the rest.
I don't believe there's been any cases of Porsche refusing to honor a warranty due to using 95RON fuel. I believe starting rumors to the contrary is unhelpful.
Petrol quality varies with every tank you put in. It isn't some textbook scientific standard. If you choose to put std 95RON fuel in you will have no problems at all. You'll just have a little less power, which many people find means a little less fuel economy, as mentioned in this thread.
Kiko - So how do Porsche warranty there cars in the US where getting 95 Octane would be good going? It really is a case of modern Porsches' run on almost any grade of Unleaded fuel, they run better (more BHP) on the higher Octane stuff. END OF.
For the record I run mine on Tesco 99 or BP Super... I have no Shell garages near me but if I am out and about I will get the Optimax/V-Power when I can.
Well, if you believe I'm starting a rumor its your problem specially if you keep using 95 and if you have your car under warranty. I've seen one customer being paid only half based JUST on that and another being completely void based on that and class 2 overrev. Go figure...
nbetts said:
kiko said:
willdew said:
kiko said:
2)When analysing the engine management with a PST2 there alot of data available (overrev 1, overrev 2, hours work, mileage, LTFT, STFT, error codes, etc) and one of them is a knock sensor counter which is not flagged with 98 but it knocks back timing on 95 so in case of a warranty claim they can see you haven't been using the correct fuel and you can guess the rest.
I don't believe there's been any cases of Porsche refusing to honor a warranty due to using 95RON fuel. I believe starting rumors to the contrary is unhelpful.
Petrol quality varies with every tank you put in. It isn't some textbook scientific standard. If you choose to put std 95RON fuel in you will have no problems at all. You'll just have a little less power, which many people find means a little less fuel economy, as mentioned in this thread.
Kiko - So how do Porsche warranty there cars in the US where getting 95 Octane would be good going? It really is a case of modern Porsches' run on almost any grade of Unleaded fuel, they run better (more BHP) on the higher Octane stuff. END OF.
For the record I run mine on Tesco 99 or BP Super... I have no Shell garages near me but if I am out and about I will get the Optimax/V-Power when I can.
Well, if you believe I'm starting a rumor its your problem specially if you keep using 95 and if you have your car under warranty. I've seen one customer being paid only half based JUST on that and another being completely void based on that and class 2 overrev. Go figure...
Nbetts hi,
Porsche warraty those vehicles in the US because those vehicles are US models with many differences (daylight, warts, California compliance, starting with clutch down, etc, etc, etc) and one of them is the engine software adapted to lower grade fuel without triggering knock sensor counter. Thats why the fuel flap says minimum required fuel, Super Unleaded 98 RON and in the US its says 91-93 AKI (different standards). Mind you that the first 542 bhp kit RS Tuning did for a client he had to ship 2 x 93 aki fuel barrels which is approx. 98 RON but even so Reinhold Schmirler reckoned it was different enough. END of
P.S. Take my advise, it's free. It says 98 on the tin for a reason. Use 95 in case you can't find 98.
Kiko
The knock sensor will only adjust the ecu to similar settings that the cars programmed to run on the poorer fuel in countries like the US, the fact is that the car is designed to run on both. So what difference is there in the end result. What about people who are running cars in places where they cant get super? What about the fact that for a while in this country, the best many people could get was 97? What about the fact that if the fuel sits in your tank for more than a couple of weeks, the additives in there to boost the octane will start to go off leaving you with a grade more like 95? I could go on....but I would like to see porsche prove a warranty claim is down to poor fuel when in fact they are just looking to cover themselves in cases of random engine failure that are down to them. I would never admit to using 95, there is no way they can prove it as there are too many other variables.
Finally I repeat....the advice given is NOT to use 95 at all times, there is no economic or practical benefit. The advice given is.....if you cant get super just use 95, it wont do any harm and you wont have to push your car home.
The knock sensor will only adjust the ecu to similar settings that the cars programmed to run on the poorer fuel in countries like the US, the fact is that the car is designed to run on both. So what difference is there in the end result. What about people who are running cars in places where they cant get super? What about the fact that for a while in this country, the best many people could get was 97? What about the fact that if the fuel sits in your tank for more than a couple of weeks, the additives in there to boost the octane will start to go off leaving you with a grade more like 95? I could go on....but I would like to see porsche prove a warranty claim is down to poor fuel when in fact they are just looking to cover themselves in cases of random engine failure that are down to them. I would never admit to using 95, there is no way they can prove it as there are too many other variables.
Finally I repeat....the advice given is NOT to use 95 at all times, there is no economic or practical benefit. The advice given is.....if you cant get super just use 95, it wont do any harm and you wont have to push your car home.
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