Quote Originally Posted by Jccck View Post
Newly changed oil shouldn't noticably affect your Motor's performance/feel compared with the same oil 10,000km's later.
If it is, maybe you should be changing more often/using a better oil/get a new Motor.
Oil does make a notable difference, ell when you switch from xw-40 to xw-30 you could feel it.

Not to mention to switch from dino to full synthetic.

When my euro changed from xw-40 castrol GTX to mobil one xw-30 the car feels much smoother and revs muh easier.