octane PORSCHE 911 GT3 2004 5.G Owners Manual

FuelQuality

Your engine isdesigned toprovide optimum performance andfueleconomy using

unleaded premiumfuelwith anoctane ratingof98 RON (93CLC orAKI).

Porsche therefore recommends theuse ofthese fuelsinyour vehicle.
Porsche alsorecognizes thatthese fuelsmaynotalways beavailable. Beassured thatyour vehicle willoperate
properly onunleaded premiumfuelswithoctane numbers ofatleast
95RON (90CLC orAKI).

since theengine's "Electronic Oktane™knockcontrol" willadapt theignition timing,ifnecessary.

Fuels containing alcoholandether

Some areasofthe U.S. require oxygenated fuelsduring certain portions ofthe year.
Oxygenated fuelsarefuels which contain alcohols (suchasmethanol orethanol) orether (such asMTBE).
Under normal conditions, theamount ofthese compounds inthe fuel willnot affect driveability.
You may useoxygenated fuelsinyour Porsche, providedtheoctane requirements foryour vehicle aremet.
We recommend, however,tochange toadifferent fuelorstation ifany ofthe following problems occurwithyour vehicle:
- Deterioration ofdriveability andperformance.
- Substantially reducedfueleconomy.
- Vapor lockandnon-start problems, especiallyathigh altitude orathigh temperature.
- Engine malfunction orstalling.

Fuels containing MMT

Some NorthAmerican fuelscontain anoctane enhancing additivecalledmethylcyclopentadienyl manganesetricarbonyl(MMT).
If such fuels areused, youremission controlsystem performance maybenegatively affected.
The check engine warning lightsonyour instrument panelmayturnon.
If this occurs, Porsche recommends youstop using fuelscontaining MMT.

4

FuelEconomy

Fuel economy willvary depending onwhere,
when andhow youdrive, optional equipment
installed, andthegeneral condition ofyour
car.
A car tuned tospecifications andcorrectly
maintained, willhelp youtoachieve optimal
fuel economy.

~ Have yourvehicle tunedtospecifications.
Air cleaner shouldbedirt free toallow proper
engine "breathing".
Battery shouldbefully charged.
Wheels shouldbeproperly aligned.
Tires should beinflated atcorrect pressure.
~ Always monitor yourfuelconsumption.
~ Drive smoothly, avoidabrupt changes inspeed
as much aspossible.
~ Avoid jackrabbit startsandsudden stops.
~ Donot drive longer thannecessary inthe lower
gears. Shifting intoahigher gearearly without
lugging theengine willhelp save fuel.
~ Prolonged "warmup"idling wastes gas.Start
the vehicle justbefore youareready todrive.
Accelerate slowlyandsmoothly.
~ Switch offthe engine ifstationary forlonger
periods.
Maintenance, CarCare ~
Any additional weightcarried inthe vehicle re-
duces fueleconomy. Alwayskeepcargo toa
minimum andremove allunnecessary items.
~ Organize yourtripstotake inseveral errands
in one trip.
~ Allelectrical accessories contributetoin-
creased fuelconsumption.
~ Only switch onthe airconditioning whenneces-
sary.
~ Donot drive withtheRoof Transport System
mounted unlessyouneed it.

The EPA estimated m.p.g.isto be used for
comparison purposes,actualmileage may
be different fromtheestimated m.p.g.,
depending onyour driving speed,weather
conditions andtriplength. Youractual
highway mileagewillprobably beless than
the estimated m.p.g.

~ Please observe alllocal andnational speed
limits.
Operating
YourPorsche inother
Countries

Government regulationsinthe United States and
Canada requirethatautomobiles meetspecific
emission regulations andsafety standards. There-
fore, carsbuiltforthe U.S. andCanada differfrom
vehicles soldinother countries.
If you plan totake your Porsche outsidetheconti-
nentallimits ofthe United States orCanada, there
is the possibility that
- unleaded fuelmay notbeavailable;
- unleaded fuelmay have aconsiderably lower
octane rating.Excessive engineknockandse-
rious damage toboth engine andcatalytic con-
verters couldresult;
- service maybeinadequate duetolack ofprop-
er service facilities, toolsordiagnostic equip-
ment;
- replacement partsmaynotbeavailable orvery
difficult toget.

Porsche cannotberesponsible forthe
mechanical damagethatcould result
because ofinadequate fuel,service orparts
availability.

If you purchased yourPorsche abroadandwant to
bring itback home, besure tofind outabout ship-
ping andforwarding requirements, aswell ascur-
rent import andcustoms regulations.

1.
Important:
Stoptheengine andswitch offthe
FuelRecommendations

ignition.

Refuelling
Fuel tank capacity islisted under "Capacities".
Porsche doesnotrecommend theuse offuel ad-
ditives.

I>
Please observe thechapter "CAPACITIES" on
Page 185.
Maintenance, CarCare 2.
Slowly unscrew thetank cap.
Hang thetank caponthe plastic strapofthe
filler flap.
3. Insert fuel-hose nozzlefullyintothefiller neck
with thehandle ofthe fuel-hose nozzlefacing
down.
4. Donot add further fuelonce thecorrectly op-
erated automatic fuel-hosenozzlehas
switched off.
Fuel could sprayorcould runover inwarm
temperatures.
5. Replace thetank capimmediately after
refuelling andturn ituntil youhear itand feel it
engage.

If you lose thetank cap,youmust replace it
only with anoriginal parttoreduce the
possibility ofafire inthe event ofacollision.
Your
Porsche isequipped withcatalytic convert-
ers and must use
UNLEADED FUELONLY.

Your engine isdesigned toprovide optimum per-
formance andfuel economy usingunleaded premi-
um fuel with anoctane ratingof
98 RON
(93 CLC orAKI).
Porsche therefore recom-
mends theuse ofthese fuelsinyour vehicle.
Porsche alsorecognizes thatthese fuelsmaynot
always beavailable. Beassured thatyour vehicle
will operate properly onunleaded premiumfuels
with octane numbers ofatleast
95RON
(90 CLC orAKI),
sincetheengine's "Electronic
Oktane
™
knock control" willadapt theignition tim-
ing, ifnecessary.

The useofUNLEADED FUELONLY is
critically important tothe lifeofthe catalytic
converters. Depositsfromleaded fuelswill
ruin theconverters andmake itineffective as
an emission controldevice.

Cars withcatalytic converters haveasmaller fuel
tank opening, andgas station pumps havesmaller
nozzles. Thiswillprevent accidental pumpingof
leaded fuelintocars withcatalytic converters.

Octane ratings

The CLC orAKI octane ratingisusually lowerthan
the RON rating:
For example: 95RON equals 90CLC orAKI
Unleaded
fuelsmaynotbeavailable outsidethe
continental U.S.andCanada. Therefore, werec-
ommend youdonot take your cartoareas or
countries whereunleaded fuelmay notbeavail-
able.
Octane ratingindicates afuel's ability toresist det-
onation. Therefore, buyingthecorrect octanegas
is important toprevent engine"damage".
The RON octane ratingisbased onthe research
method. TheCLC (U.S. CostofLiving Council oc-
tane rating) orAKI (antiknock index)octane rating
usually displayed onU.S. fuelpumps iscalculated
as research octanenumber plusmotor octane
number, dividedby2,that iswritten as:
Fuels
containing MMT

Some NorthAmerican fuelscontain anoctane en-
hancing additive calledmethylcyclopentadienyl
manganese tricarbonyl(MMT).

If
such fuels areused, youremission controlsys-
tem performance maybenegatively affected.
The check engine warning lightonyour instrument
panel mayturnon.

If
this occurs, Porsche recommends youstop us-
ing fuels containing MMT.
Portable FuelContainers

/!\
Danger!
Portable fuelcontainers, fullorpartially
empty, mayleakcausing anexplosion, orre-
sult infire incase ofan accident.

D>
Never carryadditional fuelinportable contain-
ers inyour vehicle.

Fuels
containing alcoholandether

Some areasofthe U.S. require oxygenated fuels
during certain portions ofthe year. Oxygenated fu-
els are fuels which contain alcohols (suchasmeth-
anol orethanol) orether (such asMTBE).
Under normal conditions, theamount ofthese
compounds inthe fuel willnot affect driveability.
You may useoxygenated fuelsinyour Porsche,
provided theoctane requirements foryour vehicle
are met. Werecommend, however,tochange to
a different fuelorstation
if
any ofthe following
problems occurwithyour vehicle:
- Deterioration ofdriveability andperformance.
- Substantially reducedfueleconomy.
- Vapor lockandnon-start problems, especially
at high altitude orathigh temperature.
- Engine malfunction orstalling.
R+M

-2-

or

RON+MON

2

Maintenance,CarCare
123

CapacitiesUse only fluids andfuels authorized byPorsche. Yourauthorized Porschedealerwillgladly advise you.

Your Porsche hasbeen designed sothat itis not necessary tomix anyadditives withoilsorfuels.
Engine
CoolantManual transmission
and differential
Fuel tank
Fuel quality
Power steering
Brake fluid
Windshield washer
Oil
change quantity withoutoilfilter approx. 9.3quarts/S.75 liters
Oil change quantity withoilfilter approx. 9.6quarts/9.0 liters
Reference indicationisthe level onthe oildipstick.
Please observe thechapter "ENGINE Oil"onPage 114.
approx. 7.39U.S.gallons/28 liters
3.5 quarts/3.3 literstransmission oilSAE 75W-90, Mobilube PTX
approx. 16.6U.S.gallons/63 liters
Your engine isdesigned toprovide optimum performance andfuel economy using

unleaded premiumfuelwith anoctane ratingof98 RON (93CLC orAKI).

Porsche therefore recommends theuse ofthese fuelsinyour vehicle.
Porsche alsorecognizes thatthese fuelsmaynotalways beavailable. Beassured thatyour vehicle
will operate properly onunleaded premiumfuelswithoctane numbers ofatleast
95RON (90CLC orAKI),

since theengine's "Electronic Oktane
™
knock control" willadapt theignition timing,ifnecessary.
approx. 1.35quarts/1.27 literhydraulic fluidPentosin CHF11S®
0.67 quarts/0.63 liters;useonly Original Porsche brakefluid.
approx. 3.19quarts/3 literswithout headlight washer
approx. 6.06quarts/5.7 literswithheadlight washer
TechnicalData

J

Jumper cables "145,160

K

Keys 19,20

L

Leather care 135
License platelight.. 82,172
Lids 99
Emergency unlocking 154
Light
Flasher 61,82, 83
Low beam 82,83
Switch 82,83
Light sensor forinstrument illumination 54,56
Load switch-off 152
Locking "22
Conditions 23
Luggage carrier 186
Luggage compartment.. 100,172
Lid 98
Lid warning light 54,56,98

M

Maintenance 112
Make-up mirror 103
Maximum permitted enginespeeds 16
Mirrors 28
Monitoring 24

192
Index
N

Notes on
Car care "130
Maintenance 112
Number platelight "82,172

o

Octane rating 122,123
Odometer 59
Oil 114,185
Consumption 16
Dipstick 116
Level checks
ll,
115
Level gauge
II

Pressure gauge 54,56,65
Pressure warninglight.. 54,56,65
On-board computer 54,56,67
Basic setting 68,73
Language selection 73
On-board literature 2
Orientation light 46
Outside-temperature display 68

p

Paint Care 130
Data 180
Parking
Brake 40,41
Brake warning light... 54,56
Light 82,168, 171
Particle filter 128Passenger
airbag,switching off 37
Passenger compartment monitoring,infrared..24
Plastic parts 134
Platform lift. 148
Power measurements 112
Power steering fluidlevel 127,185
Power windows 21,26,27
Practical tips 140

R

Radiator fan 53,114
Radio reception 105
Rear foglight... 82,
III

Rear spoiler 104
Rear viewmirrors 28
Rear window defogger 29
Relays 152
Remote control 20
Replacement key 19
Replacing bulbs 162
Replacing wiperblades 129
Roof Transport System 108,186
Running in 16

S

Safety belts 32,136
Warning light... 54,56
Safety compliance sticker 181
Seals 134
Side marker light... 82,170,
III

Side member panels 104
Snow chains 147
Snow tires 146