FORD 2001 Focus - Manual (Page 205)

Maintenance and care
205
A large amount of water without
engine coolant may be added, in
case of emergency, to reach a
vehicle service location. In this
instance, the cooling system must
be drained and refilled with a 50/50
mixture of engine coolant and
distilled water as soon as possible.
Water alone (without engine
coolant) can cause engine damage
from corrosion, overheating or
freezing.
Do not use alcohol, methanol or
brine or any engine coolants
mixed with alcohol or methanol
antifreeze (coolant). Alcohol and
other liquids can cause engine
damage from overheating or
freezing.
Do not add extra inhibitors or
additives to the coolant. These
can be harmful and compromise the
corrosion protection of the engine
coolant.