Unveiling the Differences 5w30 vs. 5w40 Motor Oils

5w30 is thinner than 5w40 at 100c and 40c. 2. 0w30 has lower viscosity at 40c than 5w30 3. 0w40 has lower viscosity than 5w40 at 40c. The main function of low-temperature fluidity is to ensure smooth starting of the vehicle and one or two minutes after starting. Good fluidity ... The main difference between 5w30 and 5w40 is their viscosity (compared to 5w-30, during the heat 5W-40 will have a thicker structure). You can continue to use 5w30 oil. You do not have to switch unless you are having excessive oil consumption (eg. 1L for every 3,000 KM). The ... 5W-40 is as thick as single grade 40 weight at 100°C, and will pump down to -30°C (at least right after oil change). For modern cars, just follow the owner's manual recommendation and you will be good even if you run 15-20min track and let the car rest. 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to ambient temperatures of 50°C, as opposed to 30°C. According to the oil/environment table, 5W40 is more suitable for hot regions than 5W30. I need to move to Arizona for a year so I would ... MILLERS EE PERFORMANCE C3 5W30 5L, MILLERS EE PERFORMANCE C3 5W40 5L, MILLERS EE PERFORMANCE ECO 5W30 5L, MILLERS OILS XF PREMIUM C3 VW 5W30 ... Valvoline Engine Oil - 5W30, 5W40, 10W40 - Autos (37) - Nairaland ... Disclaimer: Every Nairaland member is solely responsible for anything that he/she posts or ...