Only 51,188 Miles! Boasts 27 Highway MPG and 18 City MPG! Carfax One-Owner Vehicle. This Buick Riviera delivers a Supercharged Gas V6 3.8L/231 engine powering this Automatic transmission. P225/60R16 ALL-SEASON SBR BSW EAGLE GA TIRES, MEMORY/HEATED DRIVER SEAT -inc:... via Dealer Center