You're not immune to the valve stem seal issue with a '95 LS.

Been there, done that as the t-shirt says. I replaced my seals last year and also spent a lot of time trying to find out if the SOHC 3.0 motor was as prone as the 3.5 DOHC. Short answer is yes.
I had similiar symptoms - oil consumption at about 1 qt/tank (400m) and smoke, especially after idling for a while and pulling away. The latter prompted the repair as it failed state inspection. Post repair, I using about 1 qt/ 3-4 tanks (1400m)and its leaking rather than burning (no smoke).

There are several tricks to ease the repair, but it does take time and patience. Parts are cheap but you need the right tools and it takes time.

I'll be happy to fill you in more if you elect to change them!

Paul