How to Choose the Right W Rating for Engine Oil?

[Elliana]

Engine oil The method for selecting the W rating of engine oil is: For cold winters in the north, car owners can choose engine oil with a smaller number before the W, which provides better lubrication and protection during cold starts at low temperatures. For hot summers in the south, car owners can choose engine oil with larger numbers in the latter two digits, ensuring greater protection even when the engine overheats. Engine oil is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade viscosity index improvers. Engine oil is used for lubricating internal combustion engines, with its main functions being to reduce friction and wear on moving parts and to remove sludge and varnish from the engine.