Oregon Revised Statutes Mortgages and Liens § 87.152

A person who makes, alters, repairs, transports, stores, pastures, cares for, provides services for, supplies materials for or performs labor on a chattel at the request of the owner or lawful possessor of the chattel has a lien on that chattel in the possession of the person for the reasonable or agreed charges for labor, materials or services of the person, and the person may retain possession of the chattel until those charges are paid.