Volvo C70 Owner's Manual page 116

2001 VOLVO C70
If you wish to check your car before the approach of cold weather, the following advice is worth noting:
· Make sure that the engine coolant contains at least 50 percent antifreeze: that is, 3.7 qts. (3.5 liters)
Volvo Genuine Coolant/Antifreeze. This gives protection against freezing down to -31°F
(-35°C). See section "Coolant". The use of "recycled" antifreeze is not approved by Volvo. Different
types of antifreeze may not be mixed.
· Try to keep the fuel tank well filled - this prevents the formation of condensation in the tank. In
addition, in extremely cold weather conditions it is worthwhile to add fuel line de-icer before refueling.
· The viscosity of the engine oil is important. Oil with low viscosity (thinner oil) improves cold-weather
starting as well as decreasing fuel consumption while the engine is warming up. For winter use, 5W-30
oil, particularly the synthetic type*, is recommended. Be sure to use good quality oil but do not use this
cold-weather oil for hard driving or in warm weather. See section "Engine oil" for more information.
· The load placed on the battery is greater during the winter since the windshield wipers, lighting, etc.
are used more often. Moreover, the capacity of the battery decreases as the temperature drops. In very
cold weather, a poorly charged battery can freeze and be damaged. It is therefore advisable to check the
state of charge more frequently and spray an anti-rust oil on the battery posts.
· Volvo recommends the use of snow tires on all four wheels for winter driving - see section "Wheels
and tires".
· To prevent the washer fluid reservoir from freezing, add washer solvents containing antifreeze
page 119 for the location of the washer fluid
the windshield during winter driving, requiring the frequent use of the washers and wipers. The Volvo
Washer Solvent should be diluted as follows:
Down to 14° F (-10° C): 1 part washer solvent and 4 parts water
Down to 5° F (-15° C): 1 part washer solvent and 3 parts water
Down to 0° F (-18° C): 1 part washer solvent and 2 parts water
Down to -18° F (-28° C): 1 part washer solvent and 1 part water
· Use Volvo Teflon Lock Spray in the locks.
NOTE: Avoid the use of de-icing sprays as they can cause damage to the locks.
W Winter/Wet mode
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reservoir). This is important since dirt is often splashed on
(see