Removed radio antenna.
Removed unnecessary junk from trunk
Changed driving style drastically
50 PSI in all 4 tires
Sealed gaps around headlights with weatherstripping.
Removed chevy logo from hood.
Removed mudflaps behind front wheels.
1] 40 mpg
2] Reduce vehicle weight by 10%
Remove right-side windshield wiper or install air deflector over them.
Install ScanGuage II
Remove external passenger-side mirror
Install internal side mirror
Rear wheel skirts
Flat wheel covers
Change to Extended Performance Synthetic Oil
Remove front air dam under radiator
Remove seats except drivers