Washington Revised Code Title 48. Insurance § 48.18.297. Private passenger automobile defined

(1) An individually owned motor vehicle of the private passenger or station wagon type that is not used as a public or livery conveyance for passengers, nor rented to others.

(2) Any other individually owned four-wheel motor vehicle with a load capacity of fifteen hundred pounds or less which is not used in the occupation, profession, or business of the insured.