FORD 2002 Focus v.2 - Manual (Page 270)

Maintenance and Specifications
270
It is recommended you use the
appropriate Motorcraft oil filter (or
another brand meeting Ford
specifications) for your engine
application.
BATTERY
Your vehicle is equipped with a
Motorcraft maintenanceĆfree
battery which normally does not
require additional water during its
life of service.
However, for severe usage or in
high temperature climates, check
the battery electrolyte level. Refer
to the Scheduled Maintenance
Guide" for the service interval
schedules.
If the electrolyte level in the battery
is low, you can add plain tap water
to the battery, as long as you do not
use hard water (water with a high
mineral or alkali content). If
possible, however, try to only fill
the battery cells with distilled
water. If the battery needs water
often, have the charging system
checked.
Keep the electrolyte level in
each cell up the the level
indicator". Do not overfill the
battery cells.
For longer, troubleĆfree operation,
keep the top of the battery clean
and dry. Also, make certain the
battery cables are always tightly
fastened to the battery terminals.