'04 V8 with 243K miles...I am getting a slight vibration or shimmy in the steering wheel when I am driving at 65-80 mph. It doesn't seem like a tire balance issue (those were recently balance) or an alignment issue..no pulling or uneven tire wear. The shocks and springs (OEM sport) only have 60k miles on them. Tire pressure is at 32psi. Any other aspects to check? Could this be control arm bushings really beginning to show their age? It really isn't a major "there is something wrong" feel, more like a "I wish it could be better" issue, which may be very difficult to accomplish with a car having 1/4 million miles. It could also be just bad roads here in SoCal. Thoughts?