2004 PORSCHE 911 GT3 engine

Engine-compartment blower,
radiator fan

The radiator andradiator fansareinthe front of
the car.
The engine-compartment blowerismounted on
the engine compartment lid.

A
Warning!
Risk ofinjury.
After theengine isswitched off,theengine-
compartment andcoolant temperatures are
monitored forapprox. 20minutes.
During thisperiod, anddepending ontem-
perature, theengine-compartment blower
and radiator fansmaycontinue torun or
start torun.

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Carry outwork inthese areasonlywiththeen-
gine off,the ignition switched off,and exercise
extreme caution.

1
Maintenance, CarCare
Engine
Oil

Engine oilconsumption

It is normal foryour engine toconsume oil.
The rate ofoil consumption dependsonthe quality
and viscosity ofoil, the speed atwhich theengine
is operated, theclimate, roadconditions aswell
as the amount ofdilution andoxidation ofthe
lubricant.
If the vehicle isused forrepeated shorttrips, and
consumes anormal amount ofoil, the engine oil
measurement maynotshow anydrop inthe oil
level atall, even after600miles (1000 km)or
more. Thisisbecause theoilisgradually becom-
ing diluted withfuelormoisture, makingitappear
that theoillevel hasnotchanged.
The diluting ingredients evaporateoutwhen the
vehicle isdriven athigh speeds, ason anexpress-
way, making itthen appear thatoilisexcessively
consumed afterdriving athigh speeds.
If the conditions youdrive yourvehicle inare
dusty, humid, orhot, thefrequency ofthe oil
change intervals shouldbegreater. If
the vehicle isdriven atahigh rateofspeed,
climatic conditions arewarm, andtheload ishigh,
the oilshould bechecked morefrequently, as
driving conditions willdetermine therate ofoil
consumption.
- The engine inyour vehicle depends onoilto
lubricate andcool allofits moving parts.
Therefore, theengine oilshould bechecked
regularly andkept atthe required level.
- Make ita habit tohave theengine oillevel
checked withevery fuelfilling.
- The oilpressure warninglightisnot anoillevel
indicator.
The oilpressure warninglightindicates serious
engine damage maybeoccuring whenlit,ifen-
gine rpmisabove idlespeed.

Engine Oillevel

c>
Please observe thechapter "EXERCISE EX-
TREME CAUTION WHENWORKING ONYOUR
VEHICLE" onPage 112.

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Regularly checktheoillevel using theon-board
computer eachtimethevehicle isrefuelled.
Please observe thechapter "ON-BOARD COM-
PUTER (BC)"onPage 67.
A

Warning!
Risk ofburning fromhotparts inengine com-
partment. Riskofinjury byrotating parts.
The engine compartment bloweronthe en-
gine compartment lidcan start upeven with
engine off.

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Exercise extremcaution whenworking onthe
engine compartment.

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Top ofengine oilonly withtheengine off.

Engine oilishazardous toyour health and
may befatal
if
swallowed.

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Keep engine oilout ofchildren's reach.

Used engine oilcontains chemicals thathave
caused cancerinlaboratory animals.

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Always protect yourskinbywashing thorough-
ly with soap andwater.
The oildipstick andoilfiller areinthe engine com-
partment.

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Maintenance,CarCare
1

Preconditions forcorrect
oillevel

measurement withtheoildipstick

Vehicle mustbelevel.
- Engine mustberunning andatoperating
temperature (engine coolant temperature ofatleast
176T /

80°C).
- The engine mustidleforatleast 20seconds
(under 1,000rpm).
- The airconditioning mustbeoff.

1
Maintenance, CarCare
Checking
the
oillevel
andtopping off
engine oil

1. Apply handbrake andputthe gearshift leverin
neutral.
2. Unscrew capAof the oilfiller opening.
Withdraw dipstickBand wipe itwith aclean,
lint-free cloth.
3. Push dipstick fullyhome, withdraw againand
read offthe oillevel.
Push dipstick inas far asthe stop.
The

oillevel
must inno case fallbelow the
minimum orexceed themaximum
oillevel

on the dipstick.

The difference betvv'eenthetwo marks isapproxi-
mately 1.0liter/l.l quarts.
4. Add engine oilquarter-liter atatime, ifneces-
sary.
5. Check oillevel withthedipstick again.
6. Carefully closecapofthe oilfiller opening.

Engine OilRecommendation

Recommended oilviscosity rangesdependent onambient temperatures
Ambient temperature SAEViscosity Range
seasonal engineoils
generally upto-13°Fj-25°C OW-40
5W-40
5W-50
generally upto-22°F nO°C OW-40

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Use only engine oilsapproved byPorsche.
If in doubt askyour authorized PorschedealerforPorsche testedandapproved all-season oils.

Maintenance,CarCare
117

Oilchange

The engine oilhas tobe changed atthe intervals
listed inyour
Maintenance Schedule.

'" Please observe thechapter "CAPACITIES" on
Page 185.
We recommend thatyouhave theengine oil
changed atyour Porsche dealer,whohasthere-
quired oilsand thenecessary fillingequipment.
If you suspect anoilleak inthe engine haveyour
dealer checkitout immediately.
All current engineoilsarecompatible witheach
other, i.e. when making anoilchange itis not nec-
essary toflush theengine ifyou wish touse adif-
ferent brandorgrade ofoil.
Since, however, eachbrand ofoil has aspecial
composition, youshould, ifpossible, usethe
same oilbrand ifit becomes necessary totop up
between oilchanges.
Porsche engineshavelongintervals betweenoil
changes. Youcanmake bestuseofthese longoil
change intervals byusing multigrade oilssince
these arelargely independent ofseasonal fluctua-
tions intemperature.

1
Maintenance, CarCare If
your vehicle isused frequently instop-and-go
traffic incold weather, theengine willnot always
be properly warmedup.
Condensation fromproducts ofcombustion may
accumulate inthe oil.Inthis case, itis advisable
to change theoilmore frequently sothat your en-
gine once again has100% efficient engineoil.

Engine oilperformance class

Engine oilisnot only alubricant, butalso serves
to keep theengine clean,toneutralize thedirt
which penetrates intotheengine through combus-
tion andtoprotect theengine against corrosion.
To perform thesefunctions, theoilisprovided
with additives whichhavebeen specially devel-
oped forthese functions.
The efficiency ofan oilisexpressed, forexample,
by the API, ILSAC orACEA classifications.
Viscosity

Like allliquids, engineoilisviscous whencold,
and thin-bodied whenwarm. Theviscosity ofan oil
is expressed byitsSAE class. Forcold viscosity
(measured attemperatures below32°F
jO°C)
the
SAE class isgiven asanumber andtheletter "W"
(as inwinter), forhot viscosity (measured at
212°FjlOO°C) theSAE class isgiven onlyasa
number.
The viscosity ofan oilis,therefore, alwaysthe
same ifithas thesame number ofan SAE class.
Oils with twoviscosities arecalled multigrade oils;
oils with onlyoneviscosity aretermed single-
grade oils.
Single-grade oilscan notbeused inyour engine.
The viscosity ofthe engine oilfor your Porsche
has tobe chosen according tothe ambient tem-
perature giveninthe engine oilrecommendation
table.

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.

Fuel

j!\
Warning!
Fuel ishighly flammable andharmful to
health.

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Fire, open flame andsmoking areprohibited
when handling fuel.

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Avoid contact withskinorclothing.

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Donot inhale fuelvapors.

To prevent damage tothe emission control
system andengine:

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Never drivethetank completely outoffuel.

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Avoid highcornering speedsafterthewarning
lights havecome on.

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Please observe thechapter "EMISSION CON-
TROL SYSTEM" onPage 124.
Please observe thechapter "FUELECONOMY"
on Page 120.
Please observe thechapter "LEVELGAUGE"
on Page 63.

Check engine warning light

If the warning lightsinthe instrument panelandon-
board computer comeonand remain onwhile
driving, itsuggests:
- animproperly fastenedtankcap
or

- refuelling withengine running.
Opening
thefiller flap

The filler opening isunder thefiller flapinthe front
right fender.

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With thevehicle unlocked, pressonthe front
part ofthe filler flap
(arrow)
toopen theflap.
The filler flapiscentrally lockedalongwiththeoth-
er locks.
If
there isadefect inthe automatic unlocking
system:

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Open thepassenger door.

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Pull thering inthe right-hand dooraperture
(ar-

row).

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Maintenance, CarCare
21

1.
Important:
Stoptheengine andswitch offthe
FuelRecommendations

ignition.

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

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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.