I purchased my supercharged Riviera off the show room floor. This is by far the best, most dependable car I have ever owned. I now have 202,232 miles on this vehicle and it still runs like a top. I still get 26 mpg on the highway, and have always changed the oil every 3000 miles. I wish Buick would could back out with this car. Hopefully, I will be able to drive this car for another 100,000 miles.