Saturn 2009 ASTRA - Manual (Page 200)

Engine Coolant
The cooling system in your vehicle
is filled with DEX-COOL
® engine
coolant. This coolant is designed to
remain in your vehicle for five years
or 150,000 miles (240 000 km),
whichever occurs first, if you add
only DEX-COOL
® extended life
coolant.
The following explains your cooling
system and how to add coolant
when it is low. If you have a problem
with engine overheating, see
Engine Overheating on page 9-18.
A 50/50 mixture of clean, drinkable
water and DEX-COOL
® coolant will:
• Give freezing protection down to
−
34°F (
−
37°C).
• Give boiling protection up to
265°F (129°C).
• Protect against rust and
corrosion.
• Help keep the proper engine
temperature.
• Let the warning lights and gages
work as they should.
Notice: Using coolant other than
DEX-COOL
® can cause premature
engine, heater core, or radiator
corrosion. In addition, the engine
coolant may require changing
sooner, at the first maintenance
service after each 30,000 miles
(50 000 km) or 24 months,
whichever occurs first. Any
repairs would not be covered by
the vehicle warranty. Always
use DEX-COOL
® (silicate-free)
coolant in the vehicle.
What to Use
Use a mixture of one-half clean,
drinkable water and one-half
DEX-COOL
® coolant which will not
damage aluminum parts. If you
use this coolant mixture, you do not
need to add anything else.
{ CAUTION
Adding only plain water to the
cooling system can be dangerous.
Plain water, or some other liquid
such as alcohol, can boil before
the proper coolant mixture will.
The vehicle’s coolant warning
system is set for the proper
coolant mixture. With plain water
or the wrong mixture, the engine
could get too hot but would not
get the overheat warning. The
engine could catch fire and you or
others could be burned. Use a
50/50 mixture of clean, drinkable
water and DEX-COOL
® coolant.
9-16 Vehicle Service and Care