Go for it if you want, but I'd say its maybe unnecessary...

Some people are gonna tell you that you can't convert, or you can't mix, or you can't ever go back to petroleum. I don't believe it.

I've used Castrol SynTec and Mobil 1, both are good. There's been some long bloody holy wars about that on a Saab board, Castrol is a reformed type III and some people refuse to believe that's a 'true' synthetic. Mobil 1 uses type IV (PAO) feedstock. I don't know whether I should care if they both work... I've never used Amsoil or Redline or Royal Purple.

Advantages
Synthetic flows right now when its cold. You do have real winters in Idaho, right? Most engine wear happens in the first few seconds before the oil starts flowing, so synth is way better for that.

Better detergency, keeps gunk suspended so it gets drained out.

Should last longer, doesn't break down so fast in high temperatures. You could do a couple oil analyses to establish a change-interval for your particular car.

Disadvantages:
If any of your seals are questionable, or closed by gunk, then it might start leaking. Synth doesn't make anything leak, but it cleans out some gunk that might be preventing a bad seal from leaking.

Cost...