126
Instruments, On-Board Computer, Warnings
Level gage
 
When the ignition is on the fuel level is displayed.
f Please see the chapter “CAPACITIES” on 
Page 281.
If the vehicle’s inclination changes (e.g. going up 
or downhill), minor deviations in the indication may 
occur.  Note
If a small quantity of fuel
 is added to a nearly emp-
ty fuel tank, the fuel ga ge cannot measure the add-
ed fuel accurately. The „remaining range“ readout 
will also be incorrect.
Warning light “A” When the engine is running, the warning light  
of the level gage  lights up if less than approx. 
2.6 U.S. gallons (10 liters) of fuel remains in the 
tank.
Additionally, a warning is displayed in the on-board 
computer. 
f Fill up at the next opportunity. 
 Caution!
To prevent damage to the emission control 
system and engine. 
f Never drive the tank completely out of fuel. 
f Avoid high cornering speeds after the warning lights have come on. 
f Please see the chapter “EMISSION CONTROL 
SYSTEM” on Page 208. If the level gage warning light flashes
, there 
has been a system fault.
Additionally, a warning is displayed in the on-board 
computer.
There will then be no reserve warning. 
f To remedy the fault, go to an authorized 
Porsche dealer. 
Fuel 
Technical Data
281
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. 1.98 U.S.gallons/7.5 liters 
Please see the chapter “ENGINE OIL RECOMMENDATION” on Page 200.
Coolant Boxster: approx. 6.05 - 6.18 U.S. gallons/22.9 - 23.4 liters 
Boxster S : approx. 6.13 - 6.61  U.S. gallons/23.3 - 25 liters 
Manual transmission and differential Boxster: approx. 0.79 U.S. gallons/3 liters
Boxster S: approx. 0.85 U.S. gallons/3.2 liters
Porsche Doppelkupplung
Gear set approx. 0.78 U.S. gallons/2.95 liters 
Porsche Doppelkupplung
Clutch/Hydraulic fluid approx. 1.37 U.S. gallons/5.2 liters
Power steering approx. 1.1 quarts/1 liter hydraulic fluid Pentosin CHF 11 S
® or CHF 202 S
®
Brake fluidapprox. 0.4 quarts/0.39 liters; use 
only Original Porsche brake fluid 
Windshield washer approx. 0.66 U.S. gallons/2.5 liters without headlight washer 
approx. 1.58 U.S. gallons/6 liters with headlight washer 
Fuel tank Refill volume approx. 16.9 U.S. gallons/64 liters,  including approx. 2.6 U.S.gallons/10 liters 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 tha t 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 Octane™ knock control“ will adapt the ignition timing, if necessary.