2002 Buick Century Custom 4dr Sedan (3.1L 6cyl 4A)
I am really happy with my Buick Century Custom, for a mid-size luxury car, I don't think it can be beaten.
Gas mileage, 30-34 on the highway at 75- 85 mph. But, you must have a radar detector or look out, this car drives so nice that you will be going 80-90 mph and think you are only going like 60, real nice highway car. Having a radar has saved me countless times from getting a speeding ticket...
For the price and quality and features of this car, no improvements needed.