The ornamental design for a spoiler for motorvehicle, as shown and described.
FIG. 1 is a rear perspective view of a spoiler for motor vehicle;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is an enlarged left side view thereof;
FIG. 5 is an enlarged right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The portions of the spoiler for motor vehicle shown in broken lines are for illustrative and environmental purposes and form no part of the claimed design.