Although this was obviously said tongue-in-cheek, you may find that you had a better idea than you think. In absence of a dedicated automotive preparation which you like better, plain old Saddle Soap and Mink Oil are hard to beat for taking care of your seats.

While I am currently partial to AutoGlym or Zymols' leather care concoctions...in the past I have used Saddle Soap and Mink Oil quite frequently and have found them to be just as useful on seats as they are on footwear. Perhaps they require slightly more effort, but not much. The results can't help but please. Not to mention both can be found at any moderately stocked grocers for cheap...roughly two or three dollars apiece, last I purchased some.

...sT