Okla. Stat. tit. 14A, § 14A-2-112: Sale of motor vehicles - Taking security in other

vehicles.

A seller in a consumer credit sale of a motor vehicle may secure

the debt arising from the sale by contracting for a security

interest in any other motor vehicle used for the purpose of

transportation of persons or property, as well as the motor vehicle

which is the subject of the sale. Provided, further, that the

amount of the debt secured by property other than the motor vehicle

which is the subject of the sale shall be clearly set forth and when

the total debt is reduced to an amount equal to or less than the

amount secured by the motor vehicle which is the subject of the

sale, a release of the security agreement as to such "other vehicle"

will be furnished to the debtor upon request but such partial

release shall not impair the security interest on the motor vehicle

which was the subject of the sale. The total amount secured by any

transaction authorized hereunder cannot exceed the amount of the

sale price of the motor vehicle, and further, the seller cannot

advance money or other things of value to be included in such

consumer transaction.