Engine Oil Explained 5W-40 vs 5W-30 - The Essential Guide

5w40 is thicker/more viscous, and only when warm. So 5w40 is worse fuel economy etc. It's not a huge difference though. Excess amounts of oil consumed by an engine burning it can be addressed by using a thicker oil, a 10W-40 might not burn off as fast compared to ... 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 ... Both oils have the same cold temperature viscosity (5W), but 5W-40 oil has a slightly higher viscosity at operating temperatures compared ... Difference Between 5w30 and 5w40 · 5w30 has a viscosity ranging from 5 to 30Pa-Sec. · For 5w30, the range of kinematic viscosity is 9.3-12.5mm²/ ... This is the reason for the evolution of 0w-30 and 0w-40 oils, however 5w-30 synth is thinner than all in the cold, near zero F, about 1/2 as ... Generally speaking a 5w-40 is more expensive oil than a 5w-30 as it has to not thin out at the higher end of the temp. ranges. Personally I run ... Summary of 5w30 Vs. 5w40 · 5w30 oil is designed to operate at temperatures as low as -25°C, but is also a great choice for warmer climates that ... Thought I would share my recent experience of switching engine oil to more viscous 5w40 from 5w30. Car is Fabia VRS 130 PD using 505.01 PD ... No wear and no oil consumption. The engine purred like new. Now I am using LL01 BMW M Twin Power Turbo 0-40w oil. BMW wanted to use 0-30w ...