Good morning,
This weekend I set about to rotate the tires on the XTerra as it was pulling to the right and I was unsure when the tires were last rotated as I just recently acquired the vehicle. I wanted to swap them left to right just to see if she would pull to the left or track straight.
I also popped off one of the drums just to check on the rear brake wear while things where disassembled...that all appeared in order.
Anyway, after putting everything back together...the truck doesn't pull to the right anymore, she now pulls ever so slightly to the left. My whole theory is that something either has to be wrong with the steering linkage or you have to hit something pretty hard to whack the alignment out.
So I would suggest that you all rotate your tires, every other oil change should be sufficient, that's what I do on the other vehicles.
Bogatyr

yeah..I do that every other Oil Change myself...if you are a Costco member, the Tire Rotations and balances are free to members, even if you bought the tires there or not....pretty cool...

I too use the Costco every other oil change tire rotation method...

Works great!

Check the tread wear on those tires. If the front tires have uneven wear then you probably have an alignment problem. If there's any cupping then it might be a problem with the front end. Check the bushings since that's usually the first thing to go.

I'm a BJ's member. I wonder if they do the free tire rotations?

I am not sure but maybe they give some other service for your wait.

I knew that reply was coming!

Well, I figured maybe they would do it since they are similar to Costco.