If we get a lil mathematics:
2, 55 litr cylinders get filled in ~ 300+300=600 Rs
and if your car is doing around 175 KMs in Rs 600 filling then it comes out to be 600/175=3.42Rs/km.
which I think is very very good for a 4.7 L engine cuz the ave on petrol is 5 to 7km at the max per litr...58/5=11.6Rs/km.
very good brother:)