I currently have a 90 Buick LeSabre with 200K miles. I drive at least 110 miles a day. I am looking for a replacement. How will the Chevy Impala do? Iam specifically interested in the car with a 3.4L engine. This engine is supposed to get better gas mileage than the 3.8L. Will the 3.4 hold up like the 3.8 in my buick? And will it actually get better gas mileage than the 3.8? Anyone with an opinion, tell me what you think. Thanks.