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Petrol vs Diesel vs CNG
Running Cost Calculator
Enter your vehicle details and instantly compare Petrol, Diesel & CNG monthly costs. Find out which fuel saves you the most money in India.
🔍 Searches this tool answers:
✓ CNG vs Petrol cost
✓ Diesel vs Petrol savings
✓ Best fuel type for my car
✓ CNG vs Petrol cost
✓ Diesel vs Petrol savings
✓ Best fuel type for my car
Vehicle & Fuel Details
⛽ Petrol Details
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🚗 Diesel Details
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🟢 CNG Details
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Quick Tips
💡 CNG is usually cheapest per km but requires kit installation (₹60,000–₹90,000).
💡 Diesel pays off for high-mileage drivers (2,000+ km/month).
💡 Petrol suits city drivers with under 1,200 km/month usage.
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★ BEST
Diesel
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★ BEST
CNG
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Frequently Asked Questions
⛽ Is CNG cheaper than petrol in India?
Yes, CNG is significantly cheaper per km than petrol in most Indian cities. CNG costs around ₹3–4/km vs petrol's ₹6–7/km. However, CNG vehicles require a kit installation costing ₹60,000–₹90,000, which you recover in 12–18 months of savings.
🚗 When does diesel become better than petrol?
Diesel is typically better if you drive more than 1,500–2,000 km/month. Diesel cars cost ₹1–2 lakh more than petrol variants, but savings on fuel cost recover this in 2–3 years for high-mileage drivers.
🟢 What is CNG mileage for popular cars?
Popular CNG cars and their mileage: Maruti WagonR CNG: 34 km/kg, Hyundai Grand i10 CNG: 31 km/kg, Tata Tiago CNG: 26 km/kg, Maruti Alto K10 CNG: 33 km/kg. Mileage varies with driving conditions.
💡 How is running cost per km calculated?
Running cost per km = Fuel price ÷ Vehicle mileage. Example: If petrol costs ₹96/L and your car gives 15 km/L, then cost per km = ₹96 ÷ 15 = ₹6.4/km. Multiply by monthly distance for monthly fuel cost.