1) Cooling critical engine parts
by transferring heat away from them
Normal or Severe Service Schedules
Normal or ideal service consists of relatively high-speed driving on paved roads in dust-free areas. Severe service conditions include any of the following:
1) Trips of less than 15 kilometres
Short trips, especially during cold weather, can be particularly severe. The engine may not get the chance to warm-up sufficiently to boil off moisture and unused fuel in the oil, leading to the development of acids in he oil.
Since the engine is partially cooled by airflow, temperatures can increase when the engine is idling. High temperatures can increase when the engine is under heavy loads, such as when towing. High temperatures can lead to more rapid oil oxidation and thickening.
When you drive in dusty conditions, abrasives can get past the air filter and into the oil system. All of these conditions are very hard on motor oils. They introduce extra contaminants or waste products into he motor oil and create the need for frequent oil changes.
Have your vehicle oil changed every 3 to 4 months or 5,000 kilometres to avoid any long-term problems and to allow the motor oil to perform its tasks most efficiently.
Driving in Wet Weather
Hydroplaning - This is caused when there's too much water on the road and you are traveling too fast causing your vehicle to ride on top of the water. Tires must cut through the water to maintain contact with the road, so to avoid this don't drive on bald or badly worn tires and make sure your tires are properly inflated.