The subject of the thread shows the distance covered in 27.6 Liter fuel.
After returning back from Faisalabad, I still had ~12 Liter petrol in the Tank.
And as I said recently, the Octane booster was poured to let engine feel better (combustion) while driving the highway. It really doesn't mean that I added it to get more mileage.
Secondly, I used "HALF" bottle (75 ml only) and not full.
So, lets make the calculations again.
Total Petrol price: 114Rs. x 27.6 = Rs. 3146
Octane booster price: Rs. 500
Total fuel cost: 3146 + 500 = 3646
Total distance covered: 472kms
Price per km: 3646/472 = Rs. 7.72
So it means : 114/7.72 = 14.76 Kms per litre
AND WITHOUT OCTANE BOOSTER
TOTAL PETROL PRICE: 114RS. X 27.6 = RS. 3146
TOTAL FUEL COST: 3146
TOTAL DISTANCE COVERED: 472KMS
PRICE PER KM: 3146/472 = RS. 6.66
SO IT MEANS : 114/6.66 = 17.1 KMS PER LITRE
HOPE CLEAR.