We claim the ornamental design for the auxiliary fuel tank for a vehicle, as shown and described.
FIG. 1 is a front perspective view of an auxiliary fuel tank for a vehicle;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a front perspective view thereof showing the auxiliary fuel tank for a vehicle in its environment.
The broken lines are for illustrative purposes only and form no part of the claimed design. The auxiliary fuel tank for a vehicle shown in FIGS. 1-7 illustrates a first embodiment of our novel design shown on the left side of a vehicle. Our design also includes a second embodiment suitable for use on the opposite side of the vehicle, the second embodiment mirrors symmetrically FIGS. 1-8 and therefore is not separately illustrated.