2000 Mercury Cougar Owner Guide 1st Printing - Page 229
2000 Mercury Cougar Manual
Page 229 highlights
Maintenance and care Octane recommendations Your vehicle is designed to use regular gasoline with an (R+M)/2 octane rating of 87. We do not recommend gasolines labeled as regular" in high altitude areas that are sold with octane ratings of 86 or even less. Do not be concerned if your vehicle sometimes knocks lightly. However, if it knocks heavily under most driving conditions on the recommended octane, see your dealer or a qualified service technician to prevent any engine damage. 229
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Maintenance
and care
229
Octane
recommendations
Y
our
vehicleisdesignedtouse
regulargasolinewithan
(R+M)/2
octaneratingof87.Wedonot
recommendgasolineslabeledas
±regular"inhighaltitudeareasthat
aresoldwithoctaneratingsof86or
evenless.
Donotbeconcernedifyourvehicle
sometimesknockslightly.However,
ifitknocksheavilyundermost
drivingconditionsonthe
recommendedoctane,seeyour
dealeroraqualifiedservice
techniciantopreventanyengine
damage.