(2) In lieu of maintaining an actual record of fuel used, a user required to be licensed under ORS 319.550 who operates a motor vehicle with a light weight of less than 8,000 pounds may maintain an accurate record of miles operated upon Oregon highways. The gallons of taxable fuel used shall be computed by applying a reasonable miles per gallon figure to the Oregon miles operated. The Department of Transportation shall determine whether the miles per gallon figure is reasonable and its decision shall be final.
(3) Every seller of fuel for any purpose shall keep a record of fuel sold for any purpose and shall be prepared to prove that all the tax provided by ORS 319.530 has been remitted to the department. The department may specify the form of the seller’s record.
(4) Every seller, and every user of fuel in a motor vehicle required to be licensed under ORS 319.550 shall preserve in this state for a period of three years all records of fuel used or fuel sold, together with invoices and any other relevant records or papers which may be specified by the department.
(5) The department or its authorized agent may examine every user’s or seller’s records and papers required to be preserved by subsection (4) of this section at any time during normal business hours. [1959 c.188 §§19,20,21,22; 1971 c.149 §4; 1977 c.429 §8]