Viscosity is the resistance of a liquid to flow and, in the case of lubricants, it is an essential characteristic to take into account when selecting which is the best product for you.
Vehicle manufacturers are responsible for establishing the most adequate viscosity for their different models, which is included in their manuals. Usually, several viscosities are recommended since it may be necessary to adapt the viscosity to the vehicle’s usage conditions and the climatic conditions.
Viscosity is not necessarily indicative of the quality of the oil. It is just one of the properties to take into account when choosing a lubricant. However, quality level is what sets one lubricant’s properties apart from another. These quality levels are usually indicated on the label.