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NLW73
Barcelona


Joined: 27 May 2014
Posts: 1417
Location: Yateley


PostPosted: Thu Jan 24, 2019 6:25 pm    Post subject: Fuel - does anyone use normal unleaded out of choice? Reply with quote

interesting thread on facebook 911 group about fuel and what you use.

I was a bit surprised as have always put SUL in my 911s and why would you put anything else in unless totally stuck in middle of nowhere or wales with only normal UL?

surely they are meant to run on 98 and putting 95 in (unless mapped) is not gong to do any good long term?

or will it just be under powered and run rough?

for the sake of saving 4p per litre is it worth it? the SUL makes the car run better and you get more miles per tank as car would need to work harder on 95 ron.
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HSC911
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Joined: 23 Jul 2014
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PostPosted: Thu Jan 24, 2019 6:28 pm    Post subject: Reply with quote

No Judge

My uncle has been a mechanic for over 50 years and ALWAYS uses Super Cop

The car goes faster with it too Grin

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jl-c
Silverstone


Joined: 22 Jul 2013
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PostPosted: Thu Jan 24, 2019 6:33 pm    Post subject: Reply with quote

I usually use 98 but it is fine to use 95, I quote the manual:

Your engine is designed to provide optimum performance and fuel economy using unleaded premium fuel with an octane rating of 98 RON (93 CLC or AKI).
Porsche therefore recommends the use of these fuels in your vehicle.
Porsche also recognizes that these fuels may not always be available. Be assured that your vehicle will operate properly on unleaded premium fuels with octane numbers of at least 95 RON (90 CLC or AKI),since the engine’s ”Electronic Oktane™ knock control“ will adapt the ignition timing, if necessary.

So, I guess, it is totally your choice, but not necessarily wrong.
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Tobyone
Spa-Francorchamps


Joined: 20 Jan 2018
Posts: 274
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PostPosted: Thu Jan 24, 2019 6:35 pm    Post subject: Reply with quote

Got to be honest sometimes I turn up at the petrol station in a daze and put anything in.
Half the time i am surprised its not diesel.

My daily run around is a fiesta or I have a pick up truck for my business, my 911 is a weekend dry weather car, rarely do I put super in because its not the first thing I think about, maybe I should give it more thought for the 911.
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NLW73
Barcelona


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PostPosted: Thu Jan 24, 2019 6:36 pm    Post subject: Reply with quote

good spot. but if the ecu is regarding the timing and ignition its not going to push out as much power I would have thought?
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pzero
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Joined: 18 Jul 2010
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PostPosted: Thu Jan 24, 2019 6:37 pm    Post subject: Reply with quote

Another fuel thread.
Free gift for anyone who can give the number of fuel threads on here.
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HSC911
Long Beach


Joined: 23 Jul 2014
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PostPosted: Thu Jan 24, 2019 6:39 pm    Post subject: Reply with quote

99....Ron Dont know

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jl-c
Silverstone


Joined: 22 Jul 2013
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PostPosted: Thu Jan 24, 2019 6:39 pm    Post subject: Reply with quote

surely the only and definitive answer is RTFM? Smile
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Tobyone
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PostPosted: Thu Jan 24, 2019 6:40 pm    Post subject: Reply with quote

pzero wrote:
Another fuel thread.
Free gift for anyone who can give the number of fuel threads on here.




63.... Can I have my free gift now please?? x
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
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2000 Porsche 996 Carrera 4

PostPosted: Thu Jan 24, 2019 6:50 pm    Post subject: Reply with quote

jl-c wrote:
I usually use 98 but it is fine to use 95, I quote the manual:



It doesn't actually say it's fine, it says your vehicle will operate properly. But that's only in a perfect world with everything working correctly. If your knock sensors aren't working correctly they may not detect that the engine is pinking and therefore continue to run on the fuel map for 98RON and cause damage to the engine. How old's your 997? When was the last time the quartz sensors were checked? Dont know

If you ask me it's not worth the risk for the sake of.........well, I was going to say a few pence, but seeing as your car will perform faster and more economical on the higher octane fuel, where's the saving?
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jl-c
Silverstone


Joined: 22 Jul 2013
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PostPosted: Thu Jan 24, 2019 7:00 pm    Post subject: Reply with quote

alex yates wrote:
jl-c wrote:
I usually use 98 but it is fine to use 95, I quote the manual:



It doesn't actually say it's fine, it says your vehicle will operate properly. But that's only in a perfect world with everything working correctly. If your knock sensors aren't working correctly they may not detect that the engine is pinking and therefore continue to run on the fuel map for 98RON and cause damage to the engine. How old's your 997? When was the last time the quartz sensors were checked? Dont know

If you ask me it's not worth the risk for the sake of.........well, I was going to say a few pence, but seeing as your car will perform faster and more economical on the higher octane fuel, where's the saving?



The clue is in my signature. FULLY checked by Hartech due to going on their maintenance program (and believe me, they check everything, even down to the software state of the stereo!) after a full rebuild due to borescoring. And please don't anyone say you would not have borescore if you only used 98 fuel.If Porsche say it's OK then they will have covered their own backs multiple times over. We do not need more bollocks conspiracy theories.
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T8
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PostPosted: Thu Jan 24, 2019 7:01 pm    Post subject: Reply with quote

pzero wrote:


Another fuel thread.
Free gift for anyone who can give the number of fuel threads on here.



One more than the number of 'which oil?' threads but two less than the number of 'which tyres?' threads. Wink
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pzero
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PostPosted: Thu Jan 24, 2019 7:07 pm    Post subject: Reply with quote

T8 wrote:
pzero wrote:


Another fuel thread.
Free gift for anyone who can give the number of fuel threads on here.



One more than the number of 'which oil?' threads but two less than the number of 'which tyres?' threads. Wink


About as frequent as the "tip or manual?" threads then.
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mikeluke
Albert Park


Joined: 03 Jun 2014
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PostPosted: Thu Jan 24, 2019 7:09 pm    Post subject: Reply with quote

But WAY behind the "how much is it worth....???" threads!
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Phil 997
Le Mans
Le Mans


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PostPosted: Thu Jan 24, 2019 7:09 pm    Post subject: Reply with quote

OK then to answer them all I only use Shell V max and will go out of my way to find it , only use millers nano 10w50 as thats what Hartech advise and only use Michelin as they are the best. Grin Grin Grin
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spongebob squarepants
Shanghai


Joined: 20 Dec 2009
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Location: Manchester and Iraq


PostPosted: Thu Jan 24, 2019 7:19 pm    Post subject: Reply with quote

TBF I don’t always put in SUL, and I can’t notice the difference performance or economy wise. To put it into perpesctive we run a fleet of 350 odd vehicles that run on terrible third world fuel, generally to about 300,000 km without trouble on the worst third world fuel available, granted they aren’t Porsche’s and no doubt SUL is preferable, but I absolutely hate the adds where billy Porsche nut states it’s only ever been run on super.... Yawn! The idiot before (probably me) also used some 95 Grin
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
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2000 Porsche 996 Carrera 4

PostPosted: Thu Jan 24, 2019 7:20 pm    Post subject: Reply with quote

jl-c wrote:
alex yates wrote:
jl-c wrote:
I usually use 98 but it is fine to use 95, I quote the manual:



It doesn't actually say it's fine, it says your vehicle will operate properly. But that's only in a perfect world with everything working correctly. If your knock sensors aren't working correctly they may not detect that the engine is pinking and therefore continue to run on the fuel map for 98RON and cause damage to the engine. How old's your 997? When was the last time the quartz sensors were checked? Dont know

If you ask me it's not worth the risk for the sake of.........well, I was going to say a few pence, but seeing as your car will perform faster and more economical on the higher octane fuel, where's the saving?



The clue is in my signature. FULLY checked by Hartech due to going on their maintenance program (and believe me, they check everything, even down to the software state of the stereo!) after a full rebuild due to borescoring.


Do you want a wager with me on whether Hartech check the performance of the knocks sensors?
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timbo1811
Trainee


Joined: 13 Dec 2016
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PostPosted: Thu Jan 24, 2019 7:24 pm    Post subject: Reply with quote

Have used 95 in my Boxster for 9 years and 60K miles, use it in my C2 without any issues.
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Tobyone
Spa-Francorchamps


Joined: 20 Jan 2018
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PostPosted: Thu Jan 24, 2019 7:45 pm    Post subject: Reply with quote

And... Can we really be sure the quality and consistency of the fuel the pump anyway?
I doubt it
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jl-c
Silverstone


Joined: 22 Jul 2013
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PostPosted: Thu Jan 24, 2019 7:45 pm    Post subject: Reply with quote

alex yates wrote:
jl-c wrote:
alex yates wrote:
jl-c wrote:
I usually use 98 but it is fine to use 95, I quote the manual:



It doesn't actually say it's fine, it says your vehicle will operate properly. But that's only in a perfect world with everything working correctly. If your knock sensors aren't working correctly they may not detect that the engine is pinking and therefore continue to run on the fuel map for 98RON and cause damage to the engine. How old's your 997? When was the last time the quartz sensors were checked? Dont know

If you ask me it's not worth the risk for the sake of.........well, I was going to say a few pence, but seeing as your car will perform faster and more economical on the higher octane fuel, where's the saving?











The clue is in my signature. FULLY checked by Hartech due to going on their maintenance program (and believe me, they check everything, even down to the software state of the stereo!) after a full rebuild due to borescoring.


Do you want a wager with me on whether Hartech check the performance of the knocks sensors?


I give up! Enjoy your perfect world. End of discussion.
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