What is the difference between Repsol Moto Racing 10w50 and 10w40?
1 Answers
Compared to 10w40, 10w50 has higher oil viscosity and better sealing performance, but the engine will consume more fuel. At idle, higher oil viscosity results in lower noise, while at driving conditions, higher viscosity oil produces higher noise. Lower viscosity oil, on the other hand, is characterized by fuel efficiency. Generally, 40 is suitable for all seasons, while 50 is more appropriate for large-displacement vehicles in summer. The related details are as follows: 1. Protection: The oil grade is not related to its quality but represents the viscosity grade of the oil. The 'W' in the grade stands for Winter, and the number before it indicates the oil's low-temperature fluidity. The smaller the number, the better the low-temperature fluidity. The number after 'W' represents the oil's viscosity grade at 100°C. The larger this number, the better the protection the oil provides to the engine at high temperatures. 2. Viscosity characteristics: Oil 10w40 means the oil's viscosity is 10w40. The number before 'W' represents cold-start performance. The smaller the number, the easier it is to start the engine in cold weather. Common grades include 0W, 5w, 10w, and 15w. The number 40 indicates the oil's viscosity characteristics at high temperatures. High-viscosity oil (with a higher value) may be more suitable for high-speed driving or heavy-load vehicles.