Will 10W30 Hurt a 5W30 Engine

Can You Use 10W30 Instead of 5W30? In most cases, using 10W30 instead of 5W30 won’t cause immediate damage, but it may affect engine performance, fuel economy, and cold-weather starting. The main difference is that 10W30 is thicker in cold temperatures, which can impact oil flow on startup. Key Differences Between 5W30 and 10W30 When…