When should I have my Outlander in 2WD/4WD mode?

What are the benefits/cons of being in 2wd mode and 4wd mode?
Why don't I just leave my outlander in 4wd mode all the time if its giving me more grip?

The only time I've take it out so far was in light snow, hard pack snow, ice. In my mind id made sense to just leave it in 4wd all day for the grip. Thoughts?

Thanks!

When should I have my Outlander in 2WD/4WD mode?

What are the benefits/cons of being in 2wd mode and 4wd mode?
Why don't I just leave my outlander in 4wd mode all the time if its giving me more grip?

The only time I've take it out so far was in light snow, hard pack snow, ice. In my mind id made sense to just leave it in 4wd all day for the grip. Thoughts?

Thanks!