Plus one engine oil runs smoother, the easier my car's engine runs and consumes less gas.
It is therefore advisable to choose a lubricant with the highest possible fluidity rate.
How? 'Or' What? By deciphering the indices of motor oils. For example, the first digit of 15W40, indicates the fluidity of the oil at low temperatures in winter, hence the W of winter.
And the second, indicates the fluidity of hot oil. The lower these two numbers are, the thinner the oil will be.
A motor oil smoother is a good trick to help my car's engine run smoother.
With this trick, my car consumes less gasoline which saves fuel every time I drive.
At the same time, don't forget to maintain your car well to consume less fuel on a daily basis.