Using the Canadian postal code system as an example, the top level's binding concept is the postal district, and consists of 18 objects (letters). The next level down is the zone, where the objects are the digits 0â9. This is an example of an overlapping hierarchy, because each of these 10 objects has 18 parents.
The refreshed 2014 Buick Regal GS can now be had with all-wheel drive, though the added grip does come at the expense of a few horsepower. We already sampled the 2014 Regal GS and walked away mostly impressed, but now itâs time to verify how the sedanâs powertrain changes affect its performance numbers.
As the 2008 Buick LaCrosse is not intended to be a sports car, most drivers will find the base engine more than adequate for daily commutes. The 240-horsepower V6 in the CXS delivers more power, smoother operation and superior performance with only a minimal penalty in fuel economy, but costs quite a bit more.