I noticed Geno's has a few leathercare stuff listed but I didn't see one that I thought you guys would like to hear. I also own two Corvettes which have leather and vinyl interiors. Some friends showed me these products from Leatherique (http://www.leatherique.com/). REALLY good stuff, not cheap at all but extremely good. I bought my 1990 ZR1 two years ago and the leather was of course 12 years old and quite hard. I used this stuff like the directions said (the oil and the cleaner) now they are soft and supple. I just thought I would pass this along. I have no affiliation with leatherique, I just really was impressed with their stuff. And if you go on their website and see what car clubs use and recommend it (Porsche clubs, Bently, Rolls, etc. ) that is pretty impressive.
I'll have to dig out my before and after photos of my seats in my Z
I'll have to dig out my before and after photos of my seats in my Z