Due to their poor reputation, I would not use any Armor All products on leather seats. I believe they make a bottled leather cleaner and/or conditioner, plus their "leather wipes." I would use something else.
I followed a leather discussion at edmunds.com for quite a while. Wal-Mart has Tanner's Preserve leather for $3 a bottle on clearance (almost $5 at KMart). Tanner's Preserve is the product recommended by Eagle Ottawa, one of the largest automotive leather manufacturers in the world. This stuff has a pretty good rep, as does Lexol. Another one is Hide Food, available through Jaguar dealers. Pricey and more work to apply because it's a thicker paste, but I bet it works deeper into the leather than the Lexol (sprays on).
I've been considering using plain old mink oil. I've used mink oil with great results on soccer shoes for 15 years. I tried some on our leather furniture at home and it absorbed quite well.
