The ornamental design for an aromatherapyoildiffuser, as shown and described.
FIG. 1 is a front, right, and top perspective view of an aromatherapy oil diffuser, showing my design.
FIG. 2 is a rear, left, and bottom perspective view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a rear elevation view thereof.
FIG. 5 is a left side elevation view thereof.
FIG. 6 is a right side elevation view thereof.
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines shown in the drawings are included for the purpose of illustrating portions of the aromatherapy oil diffuser that form no part of the claimed design.