Volvo S40 Owner's Manual page 130

2007 Volvo S40
WARNING
After driving through water, press lightly on the brake pedal to ensure that the brakes are functioning
normally. Water or mud can make the brake linings slippery, resulting in delayed braking effect.
CAUTION
Engine damage will occur if water is drawn into the air cleaner.
If the vehicle is driven through water deeper than 9 in (25 cm), water may enter the differential and
the transmission. This reduces the oil's lubricating capacity and may shorten the service life of these
components.
Do not allow the vehicle to stand in water up to the door sills longer than absolutely necessary. This
could result in electrical malfunctions.
If the engine has been stopped while the car is in water, do not attempt to restart the engine. Have the
car towed out of the water.
Cold weather precautions
If you wish to check your vehicle before the approach of cold weather, the following advice is worth
noting:
Make sure that the engine coolant contains 50 percent antifreeze. Any other mixture will reduce freeze
protection. 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 must not be mixed.
Volvo recommends using only genuine Volvo antifreeze in your vehicle's radiator. Your Volvo retailer
stocks plenty of Volvo engine coolant to help protect your vehicle during cold weather.
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
weather oil for hard driving or in warm weather. See
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
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Synthetic oil is not used when the oil is changed at the normal maintenance intervals except at owner request and
at additional charge. Please consult your Volvo retailer.
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06 Starting and driving
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, is recommended. Be sure to use good quality oil but do not use cold-
page 231 for more information.