Well the type-s is only supposed to use premium unleaded fuels only, it says on the gas tank door and in the owners manual, and that is becuase of the 11:1 compression, anything non-premium will cause engine knock and if not, it will cause poor performance. As for tranny fluid, i'd only recommend using Honda Transmission Fluid, because it is made for our trannys and has very important additives that are needed for our cars. Royal Purple and performance transmission fluids seem to get good reviews but any Honda Tech will tell you about how important it is to stick with Honda brand on that. Motor oil is different obviously, any name brand should do plenty (AmsOil,Mobil1,Penzoil,etc) as long as you get them scheduled on time.
But i'm sure you knew all or most of this!