Engine Optimization 5w30 vs 5w40 - The Ultimate Comparison

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. 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 ... Looking to buy AMSOIL from a dealer, retailer or installer? Use the AMSOIL Locator to find out where to buy AMSOIL near you. 5W40 is thicker at higher temperatures and remains more stable than 5W30 in hot weather conditions. While both oil types resist breakdown in ... 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 ... 5w-40 is very thick in cold, which is bad for turbo apps. This is the reason for the evolution of 0w-30 and 0w-40 oils, however 5w-30 synth is ... I believe 5W-40 would actually be better! It might increase fuel consumption slightly, but I don't see any other issues with using it. Particularity of 5W40 Oils ... When hot, 5W40 engine oil is more concentrated than 5W30. It has a thicker oil film and better resistance, sealing ... Audi A5 / S5 / RS5 (B9) - 5w30 vs 5w40 - So I have been using Castrol edge 5w40 in my 2018 A5 since birth (75k). Seems this oil is becoming ... 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to ambient temperatures of 50°C, as opposed to 30°C.