Moin an alle V70, 144PS, Automatik, JTG-Gas, 370TKM Since yesterday I have my daughter’s elk in the “care”. First of all there is an oil change. Since I drive my whole fleet with 10 W40, I would also like to oil the new one. For the sake of simplicity. My questions: 1) Do I have disadvantages if I go to 10 W40? 2) Is it enough to let off the old oil, change the filter and fill the new oil, or would you rinse again with a filling? In advance already thanks for the answers.