What is the difference between 5w and 0w engine oil?
2 Answers
5w and 0w engine oils differ in their applicable temperature ranges. Here are detailed explanations about the applicable temperatures for 5w and 0w: 1. 5w is suitable for environments as low as -30 degrees Celsius; 2. 0w is suitable for environments as low as -35 degrees Celsius. Here are detailed explanations about the method for changing engine oil: 1. Lift the vehicle using a jack; 2. Drain the old oil; 3. Remove the oil filter; 4. Install a new oil filter and add new oil. Here are detailed explanations about the functions of engine oil: 1. Reduce friction and wear on moving parts; 2. Clean sludge and varnish from the engine.
After driving for so many years and trying various engine oils, I find the biggest difference between 5W and 0W lies in their performance during cold starts. 0W flows much faster in extremely cold weather, being as thin as water, allowing the engine to get lubricated instantly for smoother starts and reduced wear. 5W is slightly slower at sub-zero temperatures, requiring some warm-up time before running smoothly. During hot summer temperatures, the difference between the two is minimal, as both protect the engine during high-temperature operation. For new cars or vehicles in cold regions, I prefer 0W for better performance, balancing fuel efficiency and long-term engine health. During regular maintenance, checking the oil manual and local climate is a wise practice—don’t just focus on saving costs while neglecting engine protection.
