I wound up trying Meguiar's Gold Class Rich Leather FOAM cleaner/conditioner in a 10 oz. can. Comes out like shaving creme. What attracted me to it was that it had no warnings about using in an inconspicuous spot first and states that it won't change the look. I give it two thumbs up 'cause my seats look like new again! I've actually had it on for the last couple weeks before I posted this and it seems to last. Seems to work nice on the steering wheel too.

* Also just tried Mother's back 2 black on the exterior cladding...It
does look nice even after getting rained on or dew drops compared to STP Son of a Gun which streaks badly when exposed to rain or dew drops. I still like STP better for short
term as it gives it a nice dark shine. I will continue to use both
products...Use STP for short duration "shows" or "meets" and
B2B for the long haul! Thanks again to those who discovered B2B!