Fuel & mileage blog
New posts three times a week — India-specific writing on mileage, fuel prices, running costs and vehicle ownership, with worked examples in ₹, litres and km. Prefer evergreen how-tos? See the guides.
Should You Switch to an EV? Run the Rupees-Per-Kilometre on Your Actual Driving First
Before you switch to an EV, run the actual ₹/km math on your current driving. The numbers depend on where you charge, how you drive, and what your petrol car really costs you today.
Tyre Pressure and Mileage: The Free 3 to 5 Percent Most Drivers Leave on the Table
Running even 4 PSI low on all four tyres can cost you 3 to 5 percent of your mileage every tank. Here's the math, the right pressure to use, and how to track whether it actually worked.
km/kg, Not km/l: Tracking a CNG or Bi-Fuel Car Without Mixing Up the Fuels
CNG gives you km/kg, not km/l. Bi-fuel cars run both. Here's how to track each fuel separately, calculate true cost per km, and stop mixing up the numbers.
Has Your Mileage Changed on E20? A Two-Tank Experiment Anyone Can Run
Since April 2026 every petrol tank in India holds E20. Here is a rigorous two-tank test you can run yourself to measure exactly what it has done to your mileage and ₹/km.
When a Mileage Drop Means a Service Is Due: Your Fuel Log as an Early-Warning System
A sudden drop in your tank-to-tank mileage is often the first sign your car needs attention. Here's how to read your fuel log as a diagnostic tool before the problem gets expensive.
How to Budget Fuel for a Mumbai to Goa Road Trip (A Worked Example in Rupees)
Mumbai to Goa covers roughly 600 km and three different fuel prices. Here is a full worked budget in rupees, litres, cost per km, and where the numbers go wrong.
Highway 18, City 11: Why One Mileage Number for Your Car Is Meaningless
Your car's ARAI rating means nothing in Bengaluru peak hour. Here's why city and highway mileage diverge so sharply, and how to track what your driving actually costs.
Logging a Fill-Up in One Tap: Scanning the Pump Screen Instead of Typing Numbers
Typing pump numbers at the forecourt is where most fuel logs die. Bharometer's pump-scan feature photographs the screen and fills the numbers for you, here's exactly how it works.
Petrol vs Diesel in 2026: The Break-Even Kilometres Math Before Your Next Car
Diesel cars cost ₹1–2 lakh more at the showroom. To justify that premium, you need to drive enough kilometres for the fuel savings to cover it. Here's the exact math for 2026.
Running an Older Car or Bike on E20: A Practical Care Checklist
Every tank is now E20. If your car or bike is pre-2023, here's the practical maintenance checklist that keeps it running cleanly and tells you exactly what changed in your mileage.
Monsoon Mileage Drop: What August Traffic and Rain Do to Your km/l (And How to See It in Your Own Log)
August rains don't just slow your commute, they quietly drain 10–18% from your fuel tank. Here's the physics behind it, and how to read the proof in your own fill-up log.
CNG vs Petrol in 2026: The Rupees-Per-Kilometre Math Nobody Shows You at the Showroom
CNG looks cheaper at the pump, but the real number is rupees per kilometre, not price per kg. Here's the full math, including mileage drop, conversion cost, and fill-up hassle.
Petrol Prices Reset Every Morning at 6 AM: Why City-Level Rates Change Your Mileage Math
Petrol prices reset at 6 AM every day, and the rate at your pump can differ by ₹2–4 from a city 80 km away. Here's why that gap matters more than you think.
The Real Cost of Running Your Car's AC in City Traffic (In Rupees Per Month)
Running your car's AC in Mumbai or Bengaluru traffic costs more than the fuel bill suggests. Here's how to calculate the real monthly rupee figure for your vehicle.
Recalculating Your Cost Per Kilometre on E20: A 10-Minute Refresh Every Driver Should Do
E20 is in every tank since April 2026. If you haven't recalculated your true cost per kilometre since then, your budget number is wrong. Here's the 10-minute fix.
Tank-to-Tank Is the Only Real Mileage Number: How to Measure "Kitna Deti Hai" Properly
Your car's real mileage lives in one number: litres consumed between two full tanks, divided into kilometres driven. Here is how to measure it without guesswork.
Why Your Car's Dashboard Average Lies (By 5 to 15 Percent), and the Pump Method That Doesn't
Your car's dashboard MID shows 18.4 km/l. The pump says otherwise. Here's why the onboard computer lies by 5–15%, and the only method that gives you a true number.
Is Your Car or Bike E20-Compatible? The April 2023 Rule of Thumb
Since April 2026, every petrol pump in India dispenses E20. Here is how to check whether your car or bike is compatible, what the fuel-lid sticker actually means, and why your own log matters more than any average.
What Your Car Actually Costs Per Kilometre in India (It's Not the Mileage Number)
Mileage tells you litres per kilometre. It doesn't tell you what a kilometre actually costs. Here's how to build the real number, fuel, service, tyres, depreciation, and what to do with it.
E20 Petrol Is in Every Tank Now: How to Measure What It Means for Your Own Mileage
Since April 2026, every petrol pump in India dispenses E20. Whether your mileage actually dropped depends on your vehicle and your log. Here is how to measure it properly.
Put the maths on autopilot
Everything on this blog is what Bharometer does automatically — honest tank-to-tank mileage, ₹/km on every fill-up, CNG in kg, and your true running cost. Free on iPhone, made for India.
