How it works
Compares total trip cost for petrol, diesel, and CNG using your vehicle's real-world mileage and current pump prices. Tolls are added equally to all options. Enter actual mileage, not the manufacturer's figure (typically 15-25% higher than real driving).
When to use this
Before any long road trip to budget fuel spend, when choosing between petrol and diesel for a new car, or when evaluating a CNG retrofit.
Frequently asked questions
Why is my real-world mileage lower than claimed?
Manufacturer figures use controlled lab conditions. Real-world mileage is 15–30% lower due to traffic, AC usage, and driving style. Measure yours by dividing km driven between two full tank fills.
Does this include wear and tear?
No, only fuel and toll costs. For full cost-per-km, add approximately Rs.0.5-1.5/km for maintenance and wear depending on vehicle age.
Is a CNG retrofit worth it?
A CNG kit costs ₹15–25K and saves ₹3–5/km vs petrol, paying for itself in 5,000–8,000 km. Trade-offs include reduced boot space and shorter range per fill.