5w 30 Vs 5w 40 Difference

As with 5w30 5w40 motor oil has a cold viscosity of 5.
5w 30 vs 5w 40 difference. The most significant difference between the two engine oils is the viscosity of these oils in hot temperatures. So when it comes to picking the right motor oil 5w30 vs 5w40 the former is clearly the winner. 5w30 can be used by different type of vehicles and in different range of temperatures but is ideal for colder temperatures. Among all the options that are available in the market in the case of motor oils the ones that make car owners fall into a dilemma the most are 5w40 and 5w30.
5w40 is often used in higher mileage engine sand performs better in warmer temperatures. Low shear rate viscosity. 5w40 motor oil comparison of 2020. The main dissimilarity or difference between 5w30 and 5w40 is the viscosity of both oils in warmer temperatures.
It means at higher temperatures it will be thicker than its counterpart of hot viscosity 30. Simply put they will both pump in cold weather the same 5w indicates the pumping viscosity in cold but the 40 will have more viscosity resistance to flow than the 30. Some advantages of 5w40 oil are. The major difference between them is that 5w40 has a hot viscosity of 40.
So if we dig in into technicalities the number 5 in both oils represents the same viscosity when the engine is cold startup temperature but in case of 5w30 the 30 represents a lower viscosity when the engine is operating at high temperatures as compared 5w40 which has a higher viscosity. While 5w30 is much suitable to use in cold temperatures the 5w40 is better for hot temperatures.