Is Thin or Thick Engine Oil Better?

[LeElliana]

Under the premise of ensuring lubrication, the thinner the viscosity, the better. The reasons are as follows: 1. Better fluidity: The engine oil is mainly located in the oil pan, which is at the very bottom of the engine. When the engine is running, it needs to pump the oil from the oil pan to various parts of the engine as quickly as possible. If the oil itself is thick, its fluidity is poor, and the pumping ability is reduced. This means it takes longer to pump the oil to all parts of the engine, resulting in less satisfactory lubrication. 2. If the oil viscosity is high, the engine needs to overcome greater resistance, which inevitably consumes more fuel to meet normal power demands, i.e., it is more fuel-consuming! Therefore, many high-end cars use thinner oil.