Abstract: An automatic protective fuel fill bib which is capable of protecting an entire fender area adjacent to its fill pipe when an accidental trickling or masssive overflowing of fuel occurs from a fuel-hose nozzle during filling, yet which is so flexible that it can be compacted and stored within a small area of a fill-pipe compartment when not in use. The protective fuel fill bib comprises a super flexible gasoline-resistant rubber sheet (10) with a plastic arc-shaped supported (16) adhered onto the underside of the sheet to influence the sheet to assume a trough shape which will extend itself out and away from the automobile's finish when installed. When fuel is spilled from the fuel-hose nozzle, the fuel will be diverted by the protective fuel fill bib onto the ground without any contact with the automobile's whatsoever (FIG. 4). In lieu of an arc-shaped supporter, the bib can be made to assume the trough shape by means of a ring-shaped supported (FIG. 5), a U-shaped supporter (FIG.