For almost 2 years I struggled with my XFire and trucker's rut. The car would try and pull up out of the rut, throwing you into the next lane. It took a lot of concentration to keep it straight and made long trips mentally exhausting. I had the alignment checked, replaced the steering stabilizer, etc. but never found the cause.

Finally, I was due for new front tires and they made all the difference in the world. Now I only have to fight the rut when braking moderately hard coming up to an intersection, and I think that's pretty normal.

Also, I'm in Chicagoland and they recently repaved the section of 94 north of the 94/294 split. Whatever they've done with the asphalt makes it feel like the car is skating. It's sublte, but unnerving. It was less noticeable when I put my winter tires on. I've never felt that on any other road.