Generally good mileage. I generally have a light to medium foot, will use A/C, and most driving is a mix of suburb and hwy. Tend to get just over 20mpg. On strict highway driving with a load, get 23 plus.
Typical Buick ride, soft and comfortable.
Cargo space is ample for the mpg achieved.
Currently has 92K, and only maintenance has been oil changes etc., tires, brakes front and rear.