Walikum Salam
You would not feel huge difference in performance when switching engine oils
but a bit of difference in performance matters alot you stick with one oil in which
you feel engine is performing very good
Liqui Moly is very good engine oil but its very expensive 10w40 from liqui moly
would not be good in this hot weather i suggest try Liqui Moly 20w50 or Volvoline
if available in your area this engine oil has also good reviews
Zic is not available in 20w50
In terms of engine sound i always like my bike sound with Zic in newly
bought CD70 dream i tried atlas oil than switched to Zic. Its definitely
better engine sound immediately felt more good & crisp from exaust
and bike remains smooth in running. I have been using Zic M5 20w40
from quite long time in my motorcycles since 2013 when i had pridor 100