fuel pump PORSCHE 911 CARRERA 2003 4.G Owners Manual

Refuelling
Fueltankcapacityislistedunder"Capacities".
Porschedoesnotrecommendtheuseoffuel
additives.
1.Important:Stoptheengineandswitchoff
theignition.
2.Slowlyunscrewthetankcap.
Hangthetankcapontheplasticstrapofthe
fillerflap.
3.Insertfuel-hosenozzlefullyintothefillerneck
withthehandleofthefuel-hosenozzlefacing
down.
4.Donotaddfurtherfueloncethecorrectly
operatedautomaticfuel-hosenozzlehas
switchedoff.
Fuelcouldsprayorcouldrunoverinwarm
temperatures.
5.Replacethetankcapimmediatelyafter
refuellingandturnituntilyouhearitandfeel
itengage.

Ifyoulosethetankcap,youmustreplace
itonlywithanoriginalparttoreducethe
possibilityofafireintheeventofacolli-
sion.

Note
Theoillevelisautomaticallymeasuredduring
refuelling.
Themeasuredoillevelisdisplayedforapproxi-
matelyoneminutewhentheignitionisswitched
onortheengineisstarted.
However,thismeasurementisperformedonlyif
thefollowingpreconditionsaremet:
Engineisatoperatingtemperature,ignitionis
off,refuellingiscompletedwithin15minutes.
FuelRecommendations
YourPorscheisequippedwithcatalyticconver-
tersandmustuseUNLEADEDFUELONLY.
Yourengineisdesignedtoprovideoptimumper-
formanceandfueleconomyusingunleadedpre-
miumfuelwithanoctaneratingof98RON
(93CLCorAKI).Porschethereforerecom-
mendstheuseofthesefuelsinyourvehicle.
Porschealsorecognizesthatthesefuelsmay
notalwaysbeavailable.Beassuredthatyour
vehiclewilloperateproperlyonunleadedpre-
miumfuelswithoctanenumbersofatleast
95RON(90CLCorAKI).sincetheengine's
"ElectronicOktaneTMknockcontrol"willadapt
theignitiontiming,ifnecessary.

Theuseof
UNLEADEDFUELONLY
iscriti-
callyimportanttothelifeofthecatalytic
converters.Depositsfromleadedfuelswill
ruintheconvertersandmakeitineffective
asanemissioncontroldevice.

Carswithcatalyticconvertershaveasmaller
fueltankopening,andgasstationpumpshave
smallernozzles.Thiswillpreventaccidental
pumpingofleadedfuelintocarswithcatalytic
converters.
I>I>I>
Maintenance,CarCare
177

Unleadedfuelsmaynotbeavailableoutsidethe
continentalU.S.andCanada.Therefore,werec-
ommendyoudonottakeyourcartoareasor
countrieswhereunleadedfuelmaynotbeavail-
able.

Octaneratings

Octaneratingindicatesafuel'sabilitytoresist
detonation.Therefore,buyingthecorrectoctane
gasisimportanttopreventengine"damage".
TheRONoctaneratingisbasedontheresearch
method.TheCLC(U.S.CostofLivingCouncil
octanerating)orAKI(antiknockindex)octane
ratingusuallydisplayedonU.S.fuelpumpsis
calculatedasresearchoctanenumberplus
motoroctanenumber,dividedby2,thatiswrit-
tenas:
RON+MON
2
orR+M
2
TheCLCorAKIoctaneratingisusuallylower
thantheRONrating:
Forexample:95RONequals90CLCorAKI
178Maintenance,CarCare
Fuels
containing
alcohol
andether

SomeareasoftheU.S.requireoxygenated
fuelsduringcertainportionsoftheyear.Oxyge-
natedfuelsarefuelswhichcontainalcohols
(suchasmethanolorethanol)orether(suchas
MTBE).
Undernormalconditions,theamountofthese
compoundsinthefuelwillnotaffectdriveability.
YoumayuseoxygenatedfuelsinyourPorsche,
providedtheoctanerequirementsforyourve-
hiclearemet.Werecommend,however,to
changetoadifferentfuelorstationifanyofthe
followingproblemsoccurwithyourvehicle:
-Deteriorationofdriveabilityandperformance.
-Substantiallyreducedfueleconomy.
-Vaporlockandnon-startproblems,especially
athighaltitudeorathightemperature.
-Enginemalfunctionorstalling.
Fuels
containing
MMT
SomeNorthAmericanfuelscontainanoctane
enhancingadditivecalledmethylcyclopentadienyl
manganesetricarbonyl(MMT).
Ifsuchfuelsareused,youremissioncontrol
systemperformancemaybenegativelyaffected.
Thecheckenginewarninglightonyourinstru-
mentpanelmayturnon.
Ifthisoccurs,Porscherecommendsyoustop
usingfuelscontainingMMT.
PortableFuelContainers

A
Danger!
Portablefuelcontainers,fullorpartially
empty,mayleakcausinganexplosion,or
resultinfireincaseofanaccident.

t>Nevercarryadditionalfuelinportablecon-
tainersinyourvehicle.