I just turned over 200,000 miles today. I bought it slightly used with 4000 miles in late 2000. It has been my commute car for years. I started using synthetic motor oil at 75,000 miles. I use Mobil 1 EP in it. Mileage on long highway drives goes over 25 MPG. It left me on the road only twice. Once with a blown water pump three years ago and more recently, something with the supercharger and I had to cut away the tangled belts and limp to a repair station with no power steering. It is still very sporty and and responsive. Suspension was replaced about 4 years ago. Very reliable over all and now will see it running towards the 300K mark.
Where to begin. Pros first: -Car drives wonderfully on the highway, sometimes see 28-29 MPG. Not bad for a 3.8 -A/C is ice cold (when it decides to work) -3.8L V6 generally is a solid motor Cons: -Window regulator is out on passenger right side (common for this car). Unfortunately, I've had to put quite a bit of money into this car. Where to start: -Struts all around/upper strut mount -Replaced both valve cover gaskets, tensioner assembly -Tie rod ends replaced @ 80k -Replace Hub bearings/front axle (both sides) -City gas mileage is horrendous. I've yet to see over 20mpg. Average is 15-17. Good car for highway travel, but NOT ideal for commuting.
Bought the car used in 9/02 with 45,145 miles. Now it has 229,200 miles. This is a very reliable car! It never broke down or left me stranded. There is one thing that you must fix if you buy one of these cars with the 3.8L, and that is the lower intake manifold and gasket. I had mine fixed at 94,000 miles and never any problems. The only other thing I changed out was the front and rear brake rotors due to warped rotors. Do the scheduled coolant and transmission flushes and it will serve you a long time. Then just change the oil, tires and brake pads as needed. The leather interior has held up well, no rattles and there is no visible exterior rust!! Thank you Buick for a great car!
Too many major repairs: steering rack and air pump at 55K, rear wheel hub assembly and wiring short at 60K, dashboard light switch at 72K and transmission trouble (unresolved as yet because it will require removal and disassembly) at same time. Also, some weather stripping comes loose as does one rear door inside panel.