Just type in the volume of petrol, the distance driven since the last fill-up and the price once the tank is filled up with petrol.
Fuel Efficiency supports most common units:
• Distance : mile or kilometer;
• Volume : US gallon Imperial gallon or liter;
• mpg US,
• mpg Imp,
• km / 20 liters,
• liter per 100 kilometers.
• Cost : $ per mile or $ per kilometer;
Fuel Efficiency does behave: it takes care of your privacy, it does not sell your data and it does not display adds.
That's why no permission is required.