Quick calculation for Delhi to Jaipur (~280 km): At highway mileage of 9 km/litre and diesel at ₹90/litre expect roughly ₹2,800–3,200 in fuel one way.
Before finalising any booking, always clarify whether fuel is included or billed separately. When comparing operators for tempo traveller in Delhi, ask for an all-inclusive quote hidden fuel billing is the most common pricing dispute on outstation trips.