Porsche 911 Turbo Owner's Manual page 294

Tire Pressures for cold tires (68 °F / 20 °C)
Summer and snow tires
18 inch and 19 inch wheels, partially loaded
(up to 2 persons without luggage)
18 inch and 19 inch wheels, fully loaded
(2 or more persons with luggage)
These tire filling pressures apply only to the tire makes and types approved by Porsche.
f Please see the chapter "TIRES/WHEELS" on Page 233.
f Please see the chapter "TPM TIRE PRESSURE MONITORING" on Page 145.
Capacities
Use only fluids and fuels authorized by Porsche. Your authorized Porsche dealer will gladly advise you.
Your Porsche has been designed so that it is not necessary to mix any additives with oils or fuels.
Engine
Oil change quantity with oil filter approx. 7.9 quarts / 7.5 liters
Please see the chapter "ENGINE OIL" on Page 206.
Fuel tank approx. 17.7 U.S. gallons / 67 liters including approx. 3.17 U.S. gallons / 12 litres reserve
Fuel quality 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.
Windshield washer approx. 6.3 quarts / 6 liters with headlight washer
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Technical Data
front 34 psi (2.3 bar)
rear 40 psi (2.7 bar)
front 37 psi (2.5 bar)
rear 44 psi (3.0 bar)