As used in this chapter:
Gasoline does not include diesel fuel, commercial or industrial napthas or solvents manufactured, imported, received, stored, distributed, sold, or used exclusively for purposes other than as a motor fuel for a motor vehicle or vessel. The blending of any of the products listed in the preceding sentence, regardless of name or characteristics, is conclusively presumed to have been done to produce gasoline, unless the product obtained by the blending is entirely incapable for use as fuel to operate a motor vehicle. An additive, blend stock, or alcohol is presumed to be sold for blending unless a certification is obtained as required by the tax commissioner.
R.C. § 5735.01