2005 PORSCHE CAYENNE S octane

8Fuel QualityYour 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.Fuels containing alcohol and etherSome areas of the U.S. require oxygenated fuels during certain portions of the year.
Oxygenated fuels are fuels which contain alcohols (such as methanol or ethanol) or ether (such as MTBE).
Under normal conditions, the amount of these compounds in the fuel will not affect driveability.
You may use oxygenated fuels in your Porsche, provided the octane requirements for your vehicle are met.
We recommend, however, to change to a different fuel or station if any of the following problems occur with your vehicle:
– Deterioration of driveability and performance.
– Substantially reduced fuel economy.
– Vapor lock and non-start problems, especially at high altitude or at high temperature.
– Engine malfunction or stalling.Fuels containing MMTSome North American fuels contain an octane enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT).
If such fuels are used, your emission control system performance may be negatively affected.
The check engine warning lights on your instrument panel may turn on.
If this occurs, Porsche recommends you stop using fuels containing MMT.

258
Maintenance, Car Care
Fuel EconomyFuel economy will vary depending on where,
when and how you drive, optional equipment
installed, and the general condition of your
car.
A car tuned to specifications and correctly
maintained, will help you to achieve optimal
fuel economy.
fHave your vehicle tuned to specifications. Air
cleaner should be dirt free to allow proper en-
gine “breathing“.
Battery should be fully charged.
Wheels should be properly aligned.
Tires should be inflated at correct pressure.
fAlways monitor your fuel consumption.
fDrive smoothly, avoid abrupt changes in speed
as much as possible.
fAvoid jack rabbit starts and sudden stops.
fDo not drive longer than necessary in the lower
gears. Shifting into a higher gear early without
lugging the engine will help save fuel.
fProlonged “warm up“ idling wastes gas. Start
the vehicle just before you are ready to drive.
Accelerate slowly and smoothly.fSwitch off the engine if stationary for longer
periods.
fAny additional weight carried in the vehicle re-
duces fuel economy. Always keep cargo to a
minimum and remove all unnecessary items.
fOrganize your trips to take in several errands
in one trip.
fAll electrical accessories contribute to in-
creased fuel consumption.
fOnly switch on the air conditioning when neces-
sary.
fDo not drive with the Roof Transport System
mounted unless you need it.
The EPA estimated m.p.g. is to be used for
comparison purposes, actual mileage may
be different from the estimated m.p.g., de-
pending on your driving speed, weather con-
ditions and trip length. Your actual highway
mileage will probably be less than the esti-
mated m.p.g.
fPlease observe all local and national speed lim-
its.
Operating Your Porsche in other
CountriesGovernment regulations in the United States and
Canada require that automobiles meet specific
emission regulations and safety standards. There-
fore, cars built for the U.S. and Canada differ from
vehicles sold in other countries.
If you plan to take your Porsche outside the conti-
nental limits of the United States or Canada, there
is the possibility that
– unleaded fuel may not be available;
– unleaded fuel may have a considerably lower
octane rating. Excessive engine knock and se-
rious damage to both engine and catalytic con-
verters could result;
– service may be inadequate due to lack of prop-
er service facilities, tools or diagnostic equip-
ment;
– replacement parts may not be available or very
difficult to get.
Porsche cannot be responsible for the me-
chanical damage that could result because
of inadequate fuel, service or parts availabil-
ity.
If you purchased your Porsche abroad and want to
bring it back home, be sure to find out about ship-
ping and forwarding requirements, as well as cur-
rent import and customs regulations.

Maintenance, Car Care
259
Fuel
Warning!
Fuel is highly flammable and harmful to
health.
fFire, open flame and smoking are prohibited
when handling fuel.
fAvoid contact with skin or clothing.
fDo not inhale fuel vapours.
To prevent damage to the emission control
system and engine:
fNever drive the tank completely out of fuel.
fAvoid high cornering speeds after the warning lights have come on.
fPlease observe the chapter “HOW EMISSION
CONTROL WORKS” on Page 264.
fPlease observe the chapter “LEVEL GAUGE”
on Page 76.
To avoid permanent damage to the functionality of
the catalytic converters and oxygen sensors, use
only unleaded fuel.
The engine is designed to provide optimum
performance and fuel consumption if unleaded
premium fuel with 98 RON/88 MON is used.
If unleaded premium fuels with octane numbers of
at least 95 RON/85 MON are used, the en-
gine's knock control automatically adapts the igni-
tion timing.
Filler flapThe filler flap is located in the rear right wing and
is electrically opened with pull-button A in the driv-
er's door.
The pull-button is also ready for operation when
the ignition is switched off.
Fuel quality labelOpening
fOperate pull-button A in the driver's door.
The filler flap pops open.
Closing
fClose the filler flap until it clicks shut.
f f f

Maintenance, Car Care
261
Fuel RecommendationsYour Porsche is equipped with catalytic convert-
ers and must use UNLEADED FUEL ONLY.
Your engine is designed to provide optimum per-
formance and fuel economy using unleaded premi-
um fuel with an octane rating of 98 RON
(93 CLC or AKI). Porsche therefore recom-
mends 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 tim-
ing, if necessary.
The use of UNLEADED FUEL ONLY is critically
important to the life of the catalytic convert-
ers. Deposits from leaded fuels will ruin the
converters and make it ineffective as an
emission control device.
Cars with catalytic converters have a smaller fuel
tank opening, and gas station pumps have smaller
nozzles. This will prevent accidental pumping of
leaded fuel into cars with catalytic converters.
Unleaded fuels may not be available outside the
continental U.S. and Canada. Therefore, we rec-
ommend you do not take your car to areas or
countries where unleaded fuel may not be avail-
able.
Octane ratingsOctane rating indicates a fuel's ability to resist det-
onation. Therefore, buying the correct octane gas
is important to prevent engine “damage“.
The RON octane rating is based on the research
method. The CLC (U.S. Cost of Living Council oc-
tane rating) or AKI (antiknockindex) octane rating
usually displayed on U.S. fuel pumps is calculated
as research octane number plus motor octane
number, divided by 2, that is written as:
The CLC or AKI octane rating is usually lower than
the RON rating:
For example: 95 RON equals 90 CLC or AKI
Fuels containing alcohol and etherSome areas of the U.S. require oxygenated fuels
during certain portions of the year. Oxygenated fu-
els are fuels which contain alcohols (such as meth-
anol or ethanol) or ether (such as MTBE).
Under normal conditions, the amount of these
compounds in the fuel will not affect driveability.
You may use oxygenated fuels in your Porsche,
provided the octane requirements for your vehicle
are met. We recommend, however, to change to a
different fuel or station if any of the following prob-
lems occur with your vehicle:
– Deterioration of driveability and performance.
– Substantially reduced fuel economy.
– Vapor lock and non-start problems, especially
at high altitude or at high temperature.
– Engine malfunction or stalling.
RON MON+
2 ---------------------------------- o rRM+
2 ---------------

262
Maintenance, Car Care
Fuels containing MMTSome North American fuels contain an octane en-
hancing additive called methylcyclopentadienyl
manganese tricarbonyl (MMT).
If such fuels are used, your emission control sys-
tem performance may be negatively affected.
The check engine warning light on your instrument
panel may turn on.
If this occurs, Porsche recommends you stop us-
ing fuels containing MMT.
Portable Fuel Containers
Danger!
Portable fuel containers, full or partially
empty, may leak causing an explosion, or re-
sult in fire in case of an accident.
fNever carry additional fuel in portable contain-ers in your vehicle.
Fuel Evaporation ControlFuel tank ventingThe evaporation chamber and the carbon canister
prevent fuel from escaping to the atmosphere at
extreme high outside temperatures, when driving
abruptly around curves and when the car is parked
at an incline or in any other nonlevel position.Vapor control system and storageWhen the fuel tank is filled, vapors are collected in
the evaporation chamber by a vent line leading the
vapors to the carbon canister where they are
stored as long as the engine does not run.Purge systemWhen the engine is running, the fuel vapors from
the canister will be mixed with fresh air from the
ambient air of the canister. This mixture will be di-
rected to the intake air housing by the tank vent
line, mixed with the intake air and burned during
normal combustion.

362
Vehicle Identification, Technical Data
CapacitiesUse only fluids and fuels authorized by Porsche. Your authorized Porsche dealer will be pleased to advise you.
Your Porsche has been designed so that it is not necessary to mix any additives with oils or fuels.1 Depending on equipment levelCayenne S CayenneEngine oil change quantity without oil filter
approx. 8.5 quarts (8.0 liters)
approx. 6.0 quarts (5.7 liters)
Engine oil change quantity with oil filter approx. 9.0 quarts (8.5 liters) approx. 6.7 quarts (6.3 liters)
Reference indication is the level on the oil dipstick.
Please observe the chapter “ENGINE OIL LEVEL” on Page 244.
Coolant
1)
approx. 4.8 – 5.5 U.S. gallons (18 – 21 liters)
approx. 3.4 – 4.8 U.S. gallons (13 – 18 liters)
Manual transmission with compensation approx.1.9 quarts (1.8 litres) approx.1.9 quarts (1.8 litres)
Automatic transmission with torque converter
approx. 10.6 quarts (10.0 liters)
approx. 10.6 quarts (10.0 liters)
Transfer box approx. 0.9 quarts (0.85 liter) approx. 0.9 quarts (0.85 liter)
Front-axle differential
approx. 1.1 quarts (1.0 liter)
approx. 1.1 quarts (1.0 liter)
Rear-axle differential approx. 1.5 quarts (1.4 liters) approx. 1.2 quarts (1.25 liters)
Locking rear differential
approx. 1.7 quarts (1.6 liters)
approx. 1.7 quarts (1.6 liters)
Fuel tank
approx. 26.4 U.S. gallons (100 liters),
including approx. 3 U.S. gallons (12 liters) reserve
approx. 26.4 U.S. gallons (100 liters),
including approx. 3 U.S. gallons (12 liters) reserve
Fuel quality
The engine is designed to provide optimum performance and fuel consumption if unleaded premium fuel with
98 RON/88 MON is used.
If unleaded premium fuels with octane numbers of at least 95 RON/85 MON are used, the engine's “Electronic
Oktane™ knock control“ automatically adapts the ignition timing.
Power steering
approx. 1.6 quarts (1.5 liters) Pentosin CHF 11 S
®approx. 1.6 quarts (1.5 liters) Pentosin CHF 11 S
®
Brake fluid
approx. 1.0 quart (0.95 liter)
approx. 1.0 quart (0.95 liter)
Use only Original Porsche brake fluid.
Use only Original Porsche brake fluid.
Window/headlight washer system approx. 7.9 quarts (7.5 liters) approx. 7.9 quarts (7.5 liters)

Index
373
Vehicle info ........................................... 84
Warnings .............................................. 85
NNavigation system ...................................... 174
Normal level ............................................... 236OOctane ratings ............................................ 261
Odometer .................................................... 76
Off delay ........................................... 106
,151
Off-road ABS ..................................... 224,231
Off-road driving ........................................... 227
Recommendation ................................ 228
Off-road shifting
Limit speed ............................... 213,216
Oil ............................................................. 243
Change .............................................. 248
Consumption ........................................ 14
Dipstick .............................................. 245
Filler opening ...................................... 246
Performance class .............................. 248
Temperature gauge .............................. 74
Topping up ......................................... 246
Viscosity ............................................ 248
Warnings ............................................ 244
Oil level
Checking ............................................ 244
On-board computer .............................. 80,185
Basic Screens ...................................... 81
Clock ................................................. 101
Collapsible spare wheel ......................... 92
Comfort ............................................. 103Factory settings ..................................107
Language ...........................................107
Level ....................................................85
Lighting ..............................................106
Load ....................................................93
Locks/reduction....................................86
Main menu ............................................82
MPH limit ..............................................83
Operation, controls ...............................80
Settings .............................................101
Spare wheel..........................................91
System.................................................94
Tire pressure .................................87
,89
Tire sealant/sealing set .........................92
Tire type...............................................90
Units ..................................................106
Vehicle info ...........................................84
Warnings ..............................................85
Operating in other countries.........................258
Oxygen sensor ...........................................264
PPaint ..........................................................268
Panic button .................................................17
Panorama roof system ................................156
ParkAssist ................................162
,164
,199
Parking ......................................................209
Parking aid ..........................................34,162
Parking brake ...............................................64
Test stand ..........................................226
Warning light................................65,112
Parking heater ............................................142
Activating the memory .........................145
Faults .................................................146Programming ............................ 143
,144
Switching on and off ........................... 143
Parking light .............................................. 119
Particle filter .............................................. 254
PASM ............................................... 217,239
Display .............................................. 239
Indicator light ..................................... 113
Warning light ...................................... 239
Passenger compartment ............................ 197
Passenger compartment
monitoring system............ 21
,23,27,28,30
Passenger-seat drawer ............................... 179
PCM .......................................................... 174
Person buttons ............................................ 33
Plastic parts .............................................. 271
Polishing.................................................... 268
Porsche Active Suspension Management .... 217,
239
Display .............................................. 239
Indicator light ..................................... 113
Warning light ...................................... 239
Porsche Communication Management ......... 174
Porsche Down-Hill Assistant ........................ 226
Porsche Drive-Off Assistant ......................... 225
Porsche Entry & Drive ......................... 24
,182
Immobilizer .......................................... 25
Opening/locking rear window ................ 24
Opening/locking spare wheel bracket .... 24
Porsche Stability Management .. 217
,220
,302
Deactivating ....................................... 222
Indicator light ..................................... 112
Information light ................................. 222
Off road ............................................. 221
Switching on ...................................... 222