Differences between 5W-20, 5W-30 and 10W-30: Can they Be Swapped out? The primary differences are their viscosities when cold and once your engine has reached operating temperature. by John Baker|December 16, 2021 Let’s look at 5W-20 vs 5W-30 first. The
5W-20 vs 5W-30 vs 10W-30: What’s the Difference?
