lights CHEVROLET OPTRA 5 2007 1.G User Guide

No one can see as well at night as in the daytime.
But as we get older these differences increase.
A 50-year-old driver may require at least twice as
much light to see the same thing at night as a
20-year-old.
What you do in the daytime can also affect your
night vision. For example, if you spend the
day in bright sunshine you are wise to wear
sunglasses. Your eyes will have less trouble
adjusting to night. But if you are driving, do not
wear sunglasses at night. They may cut down on
glare from headlamps, but they also make a
lot of things invisible.
You can be temporarily blinded by approaching
headlamps. It can take a second or two, or
even several seconds, for your eyes to re-adjust
to the dark. When you are faced with severe glare,
as from a driver who does not lower the high
beams, or a vehicle with misaimed headlamps,
slow down a little. Avoid staring directly into
the approaching headlamps.Keep the windshield and all the glass on your
vehicle clean — inside and out. Glare at night is
made much worse by dirt on the glass. Even
the inside of the glass can build up a film caused
by dust. Dirty glass makes lights dazzle and
flash more than clean glass would, making the
pupils of your eyes contract repeatedly.
Remember that the headlamps light up far less of a
roadway when you are in a turn or curve. Keep your
eyes moving; that way, it is easier to pick out dimly
lighted objects. Just as the headlamps should be
checked regularly for proper aim, so should your
eyes be examined regularly. Some drivers suffer
from night blindness — the inability to see in dim
light — and are not even aware of it.
221

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, seeEngine
Overheating on page 271.
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 rst maintenance service after each
30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would not
be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
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.
268

U
Understanding Radio Reception................... 203
Uniform Tire Quality Grading....................... 320
V
Vehicle
Control..................................................... 210
Damage Warnings....................................... 5
Loading.................................................... 236
Parking Your............................................ 119
Symbols...................................................... 5
Vehicle Data Collection and Event
Data Recorders........................................ 400
Vehicle Identification
Number (VIN).......................................... 344
Service Parts Identification Label.............. 345
Ventilation Adjustment.................................. 159
Visors.......................................................... 102
W
Warning Lights, Gages and Indicators......... 161
Warnings
Hazard Warning Flashers......................... 140
Other Warning Devices............................ 140Warnings (cont.)
Safety and Symbols..................................... 4
Vehicle Damage.......................................... 5
Wheels
Alignment and Tire Balance..................... 321
Different Size........................................... 319
Replacement............................................ 322
Where to Put the Restraint............................ 50
Windows..................................................... 100
Manual..................................................... 100
Power...................................................... 101
Windshield
Washer.................................................... 144
Washer Fluid........................................... 280
Wiper Blade Replacement........................ 302
Wiper Blades, Cleaning............................ 340
Wiper Fuses............................................ 346
Wipers..................................................... 143
Windshield, Rear Washer/Wiper................... 145
Winter Driving............................................. 231Y
Your Vehicle and the Environment............... 356
422