Empowering Engines 5W-40 vs 5W-30 – The Oil That Sets Standards

However, at higher temperature, 5W-40 remains effective at over 500 C and will excel compared to 5W-30. A 5W-40 product is best for high- ... But to answer your question about whats the difference, 5w30 is a thinner oil than 5w40, hence it will provide a thinner coating on the metal in ... In the case of this liquid Molly, it's 5 W 40. The 5 is viscosity at cold temperature, which is what the W means, and 40 is viscosity at warm ... The most common engine oils used in cars are 5 and 0, also known as seasonal engine oil, which can be used in both winter and summer. 5w40 is thicker/more viscous, and only when warm. So 5w40 is worse fuel economy etc. It's not a huge difference though. 40W - 150W ... VS distributions. For use in parking lots, roadways, pathways and general area lighting. Best-in-class 5-G vibration rating. 5-year warranty. In other words, a lubricant with SAE 5W-30 will behave better when cold than a lubricant with SAE 10W-40. In contrast, oils with a higher SAE ... In this case, both 5W30 and 5W40 oils have a cold viscosity of 5. This means they will flow normally in the engine, even in cold conditions. Hot ... Coming back to the example of 5W-30, where 5W denotes the viscosity, the '30' determines the thickness of the oil at a temperature of 100 ... Well-Known Member ... A 5w40 oil will be slightly thicker (higher viscosity) at operating temperature than a 5w30 oil will be. If you've got no ...