The problem
Falling fuel economy is a warning light most people miss
Under-inflated tires, a dirty air filter, a lazy sensor, or a heavier right foot all quietly cost you fuel. Without a record, you only notice when the tank empties faster than usual — long after the problem started. Kotselog gives you the number every fill-up, so a real dip stands out immediately.
- Real km/L or MPG, not the dashboard guessComputed from actual fuel and distance between fill-ups.
- Cost per kilometerSee what every trip actually costs — handy for budgeting or claiming mileage.
- Trends over timeWatch efficiency by month or season and catch a problem while it's cheap to fix.
Two taps at the pump
Logging a fill-up takes seconds
Enter fuel & price
Type what the pump shows — the amount you paid, the fuel added, and your current odometer. That's it.
Kotselog does the math
It calculates km/L (or MPG) for that tank and updates your averages, cost per km, and monthly fuel spend automatically.
Works offline
No signal at the gas station? Log it anyway — everything is stored on your phone and ready when you are.
Read next
Get more out of every liter
Track your first tank tonight
Log one fill-up and Kotselog starts building your fuel-economy history right away. Free to start, works offline.
Open the App