Such questions! New car only two years to drive 10 thousand kilometers, whether the need to replace gear oil?
Be sure to change frequently. (change for 20000 kilometers.). You can see my post. I changed it in fifteen thousand, and now 40 thousand to change, change the screw on the top of a thick layer of iron powder. It's almost 5 millimeters thick. Change it more. If you're going to drive a few more years!
3) disperse heat, play a certain role in cooling.4) prevent corrosion and rust.5) reduce working noise, reduce vibration and the impact between gears.6) flush dirt, especially to remove dirt from the teeth to reduce wear.
The benefits of replacing gear oils:1) reduce the wear of gears and other moving parts and prolong the life of gears.
