I have had great results from Leatherique (Rejuvenator Oil and Prestine Clean) kit on my Infiniti and Z. This stuff does make a difference even with the treated leather. Brings back that great leather smell too.
03 350Z Crawford 265 Cams, Plenum, Headers, Cats, Big Bore TB, Fujitsubo Ti Exhaust, TS ECU, JWT Intake, Clutch, Flywheel
09 Xterra X - 6MT
2013 Altima 2.5 SV Storm Blue