I own a '98 Regal GS and I love it. Though, I might be a little biased, being a W-body fan and all. Premium fuel is recommended for ANY higher compression engine, and the L67 (3800 Supercharged) is running slightly higher compression than the normal L36 (3800 naturally aspirated). You may experience predetonation with 87 octane, and if you run any sort of modifications at all to the motor, I would strongly advise running a higher octane of fuel. Stock motors it shouldn't be much of a problem, but I still don't recommend it.
Anyhow, back to the car. What can I say? It's a great car for the money. Luxurious, sunroof, decent gas milage, handles good, and even the stock ones aren't too much of a slouch. To the previous poster, there's no way in hell a 91-96 3800 HO TPI is keeping up with any V8 Mustang (MAYBE an older 302; old beaten 5.0's can be dogs). But, thanks to the magic of an intake, supercharger pulley, exhaust, and a good AutoTap scan, you can be walking some of the GT guys left and right.
Ah, the looks you get when people hear the supercharger whine.. ;-)
