2003 Ford Focus Owners Manual

Maintenance and Specifications
Octane recommendations
Yourvehicleisdesignedtouse
Regularunleadedgasolinewith
87
pump(R+M)/2octaneratingof87.
Wedonotrecommendtheuseof
gasolineslabeledasRegularthat
(R+M)/2 METHOD
aresoldwithoctaneratingsof86orlowerinhighaltitudeareas.
Donotbeconcernedifyourenginesometimesknockslightly.However,if
itknocksheavilyundermostdrivingconditionswhileyouareusingfuel
withtherecommendedoctanerating,seeyourdealeroraqualified
servicetechniciantopreventanyenginedamage.
Fuel quality
Ifyouareexperiencingstarting,roughidleorhesitationdriveability
problemsduringacoldstart,tryadifferentbrandofRegularunleaded
gasoline.Premiumunleadedgasolineisnotrecommended(particularly
intheUnitedStates)becauseitmaycausetheseproblemstobecome
morepronounced.Iftheproblemspersist,seeyourdealeroraqualified
servicetechnician.
Itshouldnotbenecessarytoaddanyaftermarketproductstoyourfuel
tankifyoucontinuetousehighqualityfueloftherecommendedoctane
rating.Aftermarketproductscouldcausedamagetothefuelsystem.
Repairstocorrecttheeffectsofusinganaftermarketproductinyour
fuelmaynotbecoveredbyyourwarranty.
Manyoftheworld sautomakers
issuedtheWorld-wideFuelCharter
thatrecommendsgasoline
specificationstoprovideimproved
performanceandemissioncontrol
systemprotectionforyourvehicle.
GasolinesthatmeettheWorld-wide
FuelChartershouldbeusedwhen
available.Askyourfuelsupplier
aboutgasolinesthatmeetthe
World-wideFuelCharter.InCanada,
lookforfuelsthatdisplaytheAuto
MakersChoicelogo.
Cleaner air
Fordendorsestheuseofreformulatedcleaner-burninggasolinesto
improveairquality.
181
Product Specification
CategoriesFord Focus Manuals, Ford Manuals
Model Year2003
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