I haven't checked my 16s, but assuming that they are NOT unidirectional, I believe that the preferred rotation for non-AWD is:Front directly to back (i.e., front right to rear right, front left to rear left)ANDBack across to front (i.e., rear right to front left, rear left to front right). But don't quote me on that, but you can quote Goodyear:"All season tires should be rotated in a "modified X" pattern, meaning only the tires being moved to the drive axle are crossed to the opposite side of the vehicle."
http://www.goodyeartires.com/faqs/Rotation.htmlAs to AWD, non-unidirectional tires, Goodyear says: "If you have a four-wheel drive vehicle, we recommend crossing both pairs of tires to their new axle positions."