How to set parameter for a better mileage in Tata 4018 BS4

namaskar doston Aaj yah mere pass BS4 4018 gadi I hai jismein mileage ka yah problem a rahi hai To ismein ham step bye step janenge ki mileage ka problem kyon hua aur iska parameter ko acche se set karenge to Bane rahiye video ke last Tak aur jankari acchi Lage to like jarur kariye how to set perimeter