Huzaifa bhai,
Salam and Eid mubarak 
I have recently changed my engine oil in vario and as suggested used 3.7 litres, but its a bit down to the max mark. the guy at Caltex F-6 insisted me to pour 4 litres, but I stayed with 3.7, should I add 300ml more oil, as it is a bit down to the mark.
Thanks