2001 Ford Focus Owner Guide 4th Printing - Page 231

2001 Ford Focus Manual

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Maintenance and care Octane recommendations Your vehicle is designed to use regular" unleaded gasoline with an (R+M)/2 octane rating of 87. We do not recommend gasolines labeled as Regular" that are sold with octane ratings of 86 or lower in high altitude areas. Do not be concerned if your engine sometimes knocks lightly. However, if it knocks heavily under most driving conditions while you are using fuel with the recommended octane rating, see your dealer or a qualified service technician to prevent any engine damage. Fuel quality If you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of Regular" unleaded gasoline. Premium" unleaded gasoline is not recommended (particularly in the United States) because it may cause these problems to become more pronounced. If the problems persist, see your dealer or qualified service technician. 87 (R+M)/2 METHOD 231

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Maintenance and care
231
Octane recommendations
Your
vehicle is designed to use
²regular" unleaded gasoline with an
(R+M)/2 octane rating of
87.
We
do
not recommend gasolines labeled as
²Regular" that are
sold with octane
ratings of
86
or
lower in
high
altitude areas.
Do
not be
concerned if your engine
sometimes knocks lightly. However,
if
it knocks heavily under most
driving conditions while you
are
using fuel with the recommended
octane rating, see
your dealer or
a
qualified service technician to
prevent any
engine damage.
Fuel quality
If
you
are
experiencing starting,
rough idle
or
hesitation driveability
problems during a
cold start, try
a
different brand of ²Regular"
unleaded gasoline. ²Premium"
unleaded gasoline is not
recommended (particularly in
the
United States) because it may
cause these problems to become
more pronounced. If the
problems
persist, see
your dealer or
qualified
service technician.
87
(R+M)/2 METHOD