Which Petrol Car Is Most Economical Overall?

Looking for a compact hatchback that can squeeze through narrow lanes and handle stop-and-go traffic easily. My daily drive involves crowded market areas and tight parking spots. Between WagonR, Grand i10 Nios, Tiago, and Celerio - which one's the most practical for urban conditions? Fuel efficiency matters too since I'm stuck in traffic most days.

My current car's fuel bills are killing me honestly. Thinking of switching to something more practical that won't hurt my wallet every month. These four seem like the most sensible options for city use with decent mileage. Anyone made a similar move? Want to know which one actually delivers on the running cost promise in real-world conditions.

I'm planning some major camping trips next year and need a capable SUV that can handle everything. Looking for something that won't struggle on rough terrain, can carry my mountain bikes on top, and has space for camping gear. Budget is flexible up to ₹15 lakh. I've narrowed it down to these four, but torn between the Thar's capability and Duster's practicality. What would you choose for serious adventure use?