I wouldn't spend the money. No need for It unless you are modded and tuned for it. Just make sure you are getting gas from quality places. Gas from Bob's discount filling station is usually a bad idea. Stick to places like Chevron, Shell and BP etc.
In the market for a Fox body...
SOLD: 2007 Performance white GT Premium.
Performance: Eibach lowering kit, SVT wheels, Steeda Camber Casters, Steeda short throw, FRPP 4.10's, Airraid CAI, BBK 62mm TB, Brenspeed Detroit Rockers, Pypes Longtubes with O/R H and Violators.
For fun: Window louvers, 15% tint, Raxiom tinted taillights, J&L Audio sub.