Nomee bro speed does not rely on quick oil change
rather it is more dependent on wind direction if its in favour
or behind you definitely achieve more top speed
and i have noticed this on my pridor
suppose while going some where my pridor achieved max: 80km/h (wind opposite)
but when wind is in little favour not resisting, my pridor easily achieved 85,87km/h on return
and yeah its fun driving on Eid Roads are clean & very less traffic is there on roads
you can cruise at what ever speed you want 
Racer bro used this oil Ax5 15w40 & he was very satisfied with its performance
he used it in hot days & i guess he is still using it in his pridor
Today on one of reknown engine oil shop in my city i spotted AX5 15w40
this is after long time i am seeing this oil back in market
on shop quite some bottles in good amount were available