Pros and Cons of Multi-Grade Oil

Multi-grade oil is a product use to lubricate the components of an engine. The oil used to run a vehicle engine will experience ranges in temperature from cold to hot. Oil typically has a specific viscosity level in a particular temperature. The ranges in temperature make it difficult for single grade oils to run a vehicle efficiently. In order to change the ranges in viscosity needed, polymers are added to the single grade oils. These additives change the oil from a single grade to a multi-grade.


Multi-grade oils are modified so that it is able to perform well when the temperature rises and falls. At low level temperatures, this oil is more fluid. At high level temperatures, this oil is thicker. This property enables the oil in the vehicle to reach all of the necessary engine components as quickly as possible. This feature will lower any wear on the vehicle when it is starting and protects the engine. The components of a multi-grade oil enable the car owner to use one oil product throughout the entire year whether the weather is hot or cold. It also improves the starting ability of the engine in low temperature conditions. Multi-grade oil provides excellent performance during high temperature situations. It reduces wear on the vehicle battery and lowers fuel costs. A vehicle using multi-grade oil will use about 3% less fuel than one using single grade oil. 


Multi-grade oil products can lead to oil leaks during low temperature situations if the engine is worn. High stress and load conditions on the vehicle can also lead to polymer shearing.