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Engine oil recommendations

Viscosity describes the fluidity of the oil. Depending on the temperature of the oil tends to reduce stress. With increasing temperature, the oil becomes more fluid. This worsens the oil adhesion and the ability to withstand the high contact pressures. Upon cooling, the oil thickens; reduced turnover and increased internal friction. Due to this property, the engine oil must be used with such a viscosity that varies with temperature in a range as small as possible.

When starting a cold engine oil should be sufficiently liquid in order not to unduly overload the engine and that after start oil will penetrate into all the places where the need for lubrication.

Turnover of oil equivalent to its internal friction and is denoted by units SAE (Society of Automotive Engineers), such as SAE 30, SAE 10. High indicator SAE means that oil dense, low characterizes liquid oil. However, the viscosity of the oil is not completely characterizes lubricating oil properties.