Mississippi Code Title 27. Taxation and Finance § 27-57-5

(a) “Lubricating oil” means all petroleum-based oils or synthetic lubricants intended for use in the crankcase of an internal combustion engine, either spark ignition or diesel type. The purpose of “lubricating oil” is to reduce friction between two (2) solid surfaces moving relative to one another. Lubricating oil shall not mean spindle oils, cutting oils, steam cylinder oils, transmission fluids or oils, gear oils, industrial oils, electrical insulating oils, manufactured, recommended, advertised and intended for such; lubricating oil specifically designed for use in large stationary engines of five hundred (500) horsepower or more; oils specifically designed for use in aircraft or outboard motors, or lubricating oil additives and compounds, manufactured, recommended, advertised and intended for use as an additive or compound and packaged in quantities of one (1) gallon or less; oils which would cause damage to an internal combustion engine if used as a lubricant, or special purpose oils where the finished cost would make its use as a lubricating oil in an internal combustion engine economically prohibitive, or oils used as raw materials in manufacturing processes and any grease which is classified as a lubricant and which is manufactured, recommended, advertised and intended for use as such.

(b) “Person” means any individual, firm, copartnership, joint venture, association, corporation, estate, trust, or any other group or combination acting as a unit, and the plural as well as the singular number unless the intention to give a more limited meaning is disclosed by the context.

(c) “Distributor” means any person who acquires lubricating oil on which the tax levied by this article has not been paid and sells or delivers lubricating oil to wholesalers, retailers or directly to consumers.

(d) “Commission” or “department” means the Department of Revenue.

(e) “Refiner” or “processor” shall mean every person who shall receive, produce, manufacture, refine, distill, blend or compound lubricating oil in this state, when such person shall engage in refining or processing petroleum products in this state, and the blending or mixing process produces a finished product with different physical and chemical properties from the original products.

(f) “Waters” shall mean public waters.

(g) “Retailer” means every person who sells lubricating oil at retail.