I have the same problem with my Alto VXR 2007 model.
When I drove on Motorway and I traveled about 650 Km out of which 350 km were on motorway@ 115-125 km/hr and remaining on normal road at a speed of max 100 km/h.
I just changed the Oil before I started the journey (Havoline 20w) it was a bit higher from 2nd point on dipstick. When I reached Islamabad and checked the oil next morning. It was in the middle of 1st and 2nd point, almost a liter gone.
While I use the car with in city, it also reduce oil about a half glass of water every 800 km I think.
I keep extra oil in my car when I do regular checking, I maintain it to 2nd point on dipstick.
I used to purchase OIL from METRO STORE islamabad with Guard Oil / air filter.
How It can be fixed ?
Any suggestion ?
Thank you in advance.
Abdul Qadar