Some science behind the scenes
Starter fluid is usually a mixture of Diethyl ether with other volatile hydrocarbons such as heptane, butane or propane, and carbon dioxide (as a propellant). It is often useful when starting direct injected diesel engines or lean burn spark engines running on alcohol fuel see Solvents for more details of the other.
Starting fluid comes in a regular or premium grade. The regular grade contains 21-35% diethyl ether. Premium grade starting fluids have a 40-60% diethyl ether content. The rest of the volume is commonly taken by heptane, with small amounts of hexane. Heptane is neurotoxic.