What are the effects of high oil viscosity on the engine?

1 Answers
LaAmy
07/29/25 8:40pm
Effects of high oil viscosity on the engine: The higher the viscosity of the oil, the worse its fluidity, resulting in greater power consumption by the engine itself, poorer lubrication, and accelerated engine wear. However, oil viscosity that is too low can also have adverse effects on the engine: 1. Poor sealing effect. If the oil viscosity is too low, it can lead to poor sealing of the piston rings, directly causing blow-by in the combustion chamber and oil burning loss. 2. Increased engine noise. Engine oil, motor oil, or engine lubricant is a substance enhanced with additives in base oil, mainly containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers. Engine oil is used for lubricating internal combustion engines, with its main functions being to reduce friction and wear of moving parts and to remove sludge and varnish from the engine.
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