Oregon Revised Statutes Trade Regulations and Practices § 646.930

(a) May display on a sign visible from the street the lowest cash prices charged for the sale of the lowest grades of gasoline, diesel or other fuel.

(b) If a sign is displayed under paragraph (a) of this subsection, shall display on a sign visible at or near any dispensing device all prices charged for the sale of all grades of gasoline, diesel or other fuel offered for sale.

(a) The price per unit of measurement and the unit of measurement for a particular kind of fuel must be the same on the sign as on any dispensing device used for delivering that kind of fuel into the tanks of motor vehicles.

(b) If a cash price displayed on a sign is available only under some conditions, the sign and the dispensing device must clearly state the conditions.

(c) If a price displayed on a sign is available only in a certain area of the service station or business, the area where the price displayed is available must be clearly identified.