Will 5W30 Hurt a 5W20 Engine

Can You Use 5W30 Instead of 5W20? In most cases, using 5W30 instead of 5W20 will not cause major harm, but it may affect fuel economy, engine wear, and performance slightly. The difference between these two oils is in their viscosity at operating temperatures—5W30 is thicker than 5W20 when hot. Key Differences Between 5W30 and…