Indiana Code Title 6. Taxation § 6-6-2.5-3

Sec. 3. As used in this chapter, “blending” means the mixing of one (1) or more petroleum products, with or without another product, excluding biodiesel or blended biodiesel, if the product obtained by the blending is capable of use in the generation of power for the propulsion of a motor vehicle, an airplane, or a motorboat.  The term does not include that blending that occurs in the process of refining by the original refiner of crude petroleum or the blending of a de minimis amount of products such as carburetor detergent, oxidation inhibitor, lubricating oil, and greases.