Never hurts to ask. (Unless someone yells at you to use the search feature
)
With the golf ball, the dimples aren't really about spin/no-spin. They help reduce the size of the wake behind the ball by tripping laminar flow into a turbulent boundary layer, which permits the point where flow completely separates from the ball to happen further back.
(Since a car already has a turbulent boundary layer, that's why adding dimples won't help anything.)