Buick Lucerne 2007 Specifications download pdf (Page 347)

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 351.

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

®

may 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 your warranty. Always use

DEX-COOL

®

(silicate-free) coolant in your

vehicle.

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