Bel, once you start making over 360rwhp things start getting realy fun. Then you will you see 3rd gear sideways. But 12s isnt so hard to get. have the right set up and it should be easy to do with out ruining the cars day to day driving capabilities.
rb25, im not sure what kind mine is my mechanic said he uses motul oil and its very good compared to mobil 1 which i was using. i dont know if its 10/40 or so ever but it does the job