NOVELTY - An environmentally compatible fuel additive composition devoid of components that are persistent, bioaccumulative, and toxic, comprises greater than or equal to 4 functional components, with each component comprising a non-persistent material, a non-bioaccumulative material, or a non-toxic material.    USE - Environmentally compatible fuel additive composition for use in fuel composition used in spark-ignition engine or compression ignition engine (particularly internal combustion engine, rotary engine, gas turbine engine, four-stroke engine, two-stroke engine, or outboard motor engine). Fuel composition include but are not limited to gasoline, diesel fuel, middle distillate fuel, biodiesel fuel, alcohol (i.e., but not limited to ethanol, bioethanol, and biobutanol), aviation fuel, jet fuel, marine fuel, bunker fuel, burner fuel, home heating oil, gas-to-liquid base oil, Group I base oil, Group II base oil, Group III base oil, Group IV base oil, ester, and/or vegetable oil. (All claimed)    ADVANTAGE - The fuel additive composition is environmentally compatible and is devoid of persistent, bioaccumulative and toxic components.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) an environmentally compatible fuel composition, comprising a major amount of a fuel: and a minor amount of an additive composition, comprising greater than or equal to 4 functional components, with each component comprising an acceptable level of biodegradation as determined by a biodegradation test, a bioconcentration factor below 2000, or is devoid of a toxic effect at an aqueous concentration below 0.01 mg/L on a toxicity test;    (2) a method of making an environmentally compatible fuel composition, comprising combining a major amount of a fuel and a minor amount of an additive composition as above, with the fuel composition complying with European Council Directive 67/548/EEC; and    (3) a method of fueling an engine, comprising supplying to an engine a fuel composition as above.