Race gas in a 991 c2s?
#31
01-27-2015 | 12:23 PM
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Joined: Mar 2014
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From: uk
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A stock 2015 C2S is mapped (according to Porsche's owner's manual) to use (at most), 98 RON which is 88 MON and ~93 AKI.
The engine can use 95 RON, 85 MON ~90 AKI without any damage and the knock sensor will retard ignition timing to avoid detonation. That will slightly decrease gas mileage and power. Fuel of further lower grades, according to the manual, will further reduce engine power and increase consumption.
Use of fuel above 98 RON, 88 MON, ~93 AKI in a stock C2S will make no difference to performance or mileage as the ignition advance is maxed out to the detonation point of 98 RON.
If using 99999 AKI fuel makes you feel better, have at it. However, if you are unsure, be aware that based on octane alone, anything above 98 RON has no effect.
The engine can use 95 RON, 85 MON ~90 AKI without any damage and the knock sensor will retard ignition timing to avoid detonation. That will slightly decrease gas mileage and power. Fuel of further lower grades, according to the manual, will further reduce engine power and increase consumption.
Use of fuel above 98 RON, 88 MON, ~93 AKI in a stock C2S will make no difference to performance or mileage as the ignition advance is maxed out to the detonation point of 98 RON.
If using 99999 AKI fuel makes you feel better, have at it. However, if you are unsure, be aware that based on octane alone, anything above 98 RON has no effect.
Last edited by rjn21; 01-27-2015 at 12:29 PM.
#32
01-27-2015 | 02:11 PM
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Joined: Jun 2012
Posts: 1,724
From: Pennsylvania
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You should join the psychic friends network! Your ability to generalize and make things up is quite impressive! You could even get paid for it rather than ramble on here for no purpose at all. A lawyer I see? One step above a psychic. I don't race teenagers on the street or anyone else. I merely was curious to try 100 octane for my own kicks and was quite surprised at the results. Nothing more, nothing less.
My apologies for whatever I did to provoke your rage. I am truly sorry. Sackcloth and ashes for a week. I'll even watch Foxnews to punish myself - no, it wasn't that bad.
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