Novice oil question, 5w40 or 0w40?

Hi there, just a novice question on oil. My car is running well again after a throttle body replacement (credit to this forum!).
Now looking at an oil change and trying to decide between 5w40 or 0w40.
Note that I'm living in a tropical country so cold starts shouldn't be much of a problem.
Which spec would be better all round including the occasional track day? Thanks in advance
 
Interestingly TOTAL recommends ELF Evolution RN-Tech Elite 5W-30 since quite some time already now. I know that it was ELF Evolution 900 SXR 5W-40 before but Renault seems to have changed their recommendations for the Clio 197/200 and also the 200T at some point.