As of 2026, the choice between petrol, diesel, and compressed natural gas (CNG) is influenced by driving habits and fuel prices. Currently, CNG emerges as the most cost-effective option for city driving, with costs ranging from ₹2.5 to ₹4.5 per km, while diesel is more suited for long-distance travel, costing between ₹4 to ₹6 per km. Petrol, while easier to maintain and purchase, incurs costs of ₹6 to ₹8 per km, making it ideal for drivers with low usage, typically under 10,000 km per year. Electric vehicles (EVs) present an attractive alternative for high-mileage drivers, offering running costs as low as ₹1 to ₹1.5 per km, though they come with higher initial costs. Ultimately, the best fuel choice depends on individual driving patterns, with CNG favored for regular city use, diesel for highway driving, and petrol for infrequent drivers.