Nissan 370Z Forum - View Single Post - Increased Valve Noise After Change To Amsoil

rj45 · 08-31-2010, 08:31 AM

This is my understanding of engine oil weights. Someone correct me if I'm wrong.

Regular oil: for example, 5w-30...is a 5 weight oil that thickens to a 30 weight when it gets hot.

Synthetic oil: for example, 0w-40...is a 40 weight oil that flows like a 0 weight oil when it's cold.

08-31-2010, 08:31 AM	#31 (permalink)
rj45 Base Member Join Date: Apr 2010 Location: USA Posts: 60 Drives: 40th Anniversary Z Rep Power: 15	This is my understanding of engine oil weights. Someone correct me if I'm wrong. Regular oil: for example, 5w-30...is a 5 weight oil that thickens to a 30 weight when it gets hot. Synthetic oil: for example, 0w-40...is a 40 weight oil that flows like a 0 weight oil when it's cold.