Fuel additive bottle for use with capless diesel fuel system

7) A system for transporting and storing, and for pouring fuel additives into a capless diesel fuel system having a self-sealing mechanism triggered by tabs, said system including:

• A) A reservoir with a volume capacity of approximately 187 mL to 1000 mL;
• B) A rigid neck having a circumference in fluid communication with said reservoir;
• C) A threaded lip in communication with said rigid neck, said threaded lip including at least two longitudinally-oriented threadless paths, each threadless path spaced 162°-198° around the neck from another threadless path, and each threadless path extending 45.9°-56.1° around the circumference of the rigid neck,
• and wherein said neck is adapted so when inserting said bottle into said capless fuel system two threadless paths align with two tabs such that said tabs are depressed along threadless paths and without impeding entry of said neck by said plurality of threads;
• and
• D) A bottle cap rotatably engaged with said threaded lip.

11) A method of introducing a fluid into a capless diesel fuel system having a self-sealing mechanism triggered by tabs, said method including the steps of:

• A) Positioning a threaded lip of a bottle proximal to a fluid receiving aperture of a capless fuel system, said threaded lip having a circumference;
• B) Rotating said bottle so two threadless paths of said threaded lip of said bottle align with tabs of said capless fuel system, each threadless path spaced approximately 180° around the threaded lip one from another, and each threadless path extending approximately 51° around the circumference of the threaded lip;
• C) Depressing said tab with said threadless path;
• D) Pushing said threaded lip into said fluid receiving aperture such that tabs bypass threads of threaded lip;
• and
• E) Depositing contents of said bottle into said aperture by gravity.