Originally Posted by Jay-S

I've experienced the same symptoms but I have chalked it up to tramlining. The steering wheel does move on me. Roads weren't in bad condition when it happened. I just realized I was catching "small" seams when I started really paying attention to it. Doesn't happen to me very often and it really doesn't bother me.

Also, I've never had this happen in other cars other than when the road conditions were pretty bad.

Just my experience...not saying it is what is happening to the OP.