California Code, Business and Professions Code - BPC § 13430

As used in this article, “motor oil dealer” means any person, firm, or corporation engaged in the business of producing, packaging, or otherwise preparing motor oil for market, or selling or distributing motor oil.

Notwithstanding any other provision of this division, and for the purpose of this article, “motor oil” means any product used to lubricate the moving parts of an internal combustion engine.