Hello! I drive KIA Ceed 1.4 MPI, and alowed oil viscosities by the user manual are: 5w30, 0w40, 5w40, depending on climate.
So, I plan to use 5w30 (or 0w40) on colder months, and 5w40 at summer.
But I heard, once you switch to thicker oil (from 5w30 to 5w40) you can not go back to thinner (from 5w40 to 5w30). Any truth about that? Thanks
So, I plan to use 5w30 (or 0w40) on colder months, and 5w40 at summer.
But I heard, once you switch to thicker oil (from 5w30 to 5w40) you can not go back to thinner (from 5w40 to 5w30). Any truth about that? Thanks