Currently at 72,800 miles on the odometer. No new mods, just more bug stains on the front bumper. Average 25-26 mpg highway even with the 4.10 rear gear, though that can easily drop below 20 mpg when having a lot of fun. My 1995 Pontiac Firebird Formula Convertible was pretty much stock for the first 8 years and 48,000 miles. Now, at 10 years old my Firebird is only getting better with age. The body still has its original shiney black paint. The interior sports a new look with C5 Corvette sport seats and leather upholstery. The engine really puts the "Fire" in Firebird now, with a rating of 415Hp. Engine modifications include RGR stage 2 heads (ported, polished, larger valves and milled for 11.1:1 compression ratio); GMPP LT4 Hotcam, Comp Cams Pro Magnum 1.6 roller rockers, SLP Headers, Random Tech high flow cat, GMMG cat-back exhaust.