There are several different types of basil oil absolute aromas has selected a quottrue sweet basil oilquot ocimum basilicum known as linalol type this is the safest and most pleasant of the basil oils used in aromatherapy a stimulating and clearing oil useful when concentration is needed or when feeling tired try adding 1 drop of basil and 3 drops of lemon to the water in an oil burner to help create the right atmosphere for hours of exam revision or paperwork a blend of 1 drop each