Check your vehicle, estimate the cost change, and calculate the litres to mix.
No signup. No technical words needed. Your answers stay in your browser.
Pick vehicle type and year.
Add mileage and monthly km.
Use the caution and litre result.
Guidance only. Your manual is the final rule.
Move through the cards. No chemistry needed.
Three fields. The result updates instantly.
Example: if your vehicle is a 2021 model, enter 2021.
If the manual only mentions E10, confirm written OEM guidance before using E15 or E20. Watch mileage, cold starts, hoses and service advice as you go.
Change the values you know. Results update instantly.
Most people should leave this on E20. E85 and E100 are only for flex-fuel vehicles.
If you do not have this fuel, leave the example value and focus on the monthly estimate.
If you are blending fuel, mix these litres via E20
Do not treat this as permission to use a fuel your vehicle maker has not approved. These are estimates, not guarantees.
Newer approved vehicles are safer. Your manual still wins.
If the OEM marks it E20 compatible, this tool is mostly for planning, cost and top-up math.
If the manual lists only E10, confirm written OEM guidance before moving to E15 or E20.
Hoses, gaskets, floats and seals are the first weak point. Blend conservatively and get a mechanic to inspect.
Use only the exact fuel the maker approves. Small engines are far more sensitive to fuel changes.
Ethanol carries less energy per litre, so even a safe blend can lower real-world km/l.
Older rubber, plastics and carbureted setups need closer inspection as ethanol rises.
Ethanol attracts water. Keep containers sealed and don't leave part-filled cans for weeks.
As E20 spreads, drivers want quick blend arithmetic to plan top-ups responsibly.
Five habits that keep experiments safe.
Ethanol carries less energy per litre than petrol, so vehicles can show lower km/l on E20 even when the fuel is fully compatible. The size of the drop varies with engine design, tuning and driving conditions.
Vehicles designed for E20 are built for it. Older E10-era vehicles may need extra attention on rubber fuel-system parts, hoses and seals. Your owner's manual and OEM guidance are the final word.
Only if you have lower-ethanol or pure petrol and enough tank space. The calculator above gives you the exact litres of each.
No. E85 is high-ethanol fuel for flex-fuel vehicles. Standard engines shouldn't use it casually.
No. This site handles blend maths and general caution only. Your owner's manual and OEM guidance are the final source of truth.
Official expert committee report on E20 targets, fuel standards and rollout.
Official ministry site for petroleum programmes and public information.
Reporting on ministry clarifications and E20 mileage impact ranges.
Independent reporting on India reaching E20 and the wider biofuel picture.