no brother. Its not because of octane booster. Without it (with normal fuel) i will get the more or less same average. The purpose of pouring octane booster was not to get 50km/l average. No. It just makes the fuel combustion process rather easy for engine and ultimately it gives better performance but not in sense of getting more mileage, but in order to give an ideal medium to engine to perform well conveniently and to produce best yield for the long run.
Plz also check my previous post with subject FUEL CONSUMPTION OF PASSO AT DIFFERENT SPEEDS.
On very normal fuel, it firmly gives 36km/l when constantly running at the speed of 60km/h.
The posted pictures are real while i was driving.
