If the gasoline tank is E10, 10% ethanol is added from the tank capacity (if the gasoline tank is 50 liters, add 5 liters of ethanol + 45 liters of gasoline).
If the tank is E5, only 5% of the tank capacity is put (if the tank is 50, add 2.5 liters of ethanol + 47.5 gasoline.
If there is no percentage on the tank cap of 5%, just add ethanol before gasoline.
Add ethanol before gasoline to mix well when filling the fuel.
