If it's driven on the street you gain not from running a race-only oil. You need a "compromise", an oil that good enough for the track but has the necessary ingredients for the street (detergents etc). Many street oils are so good they work very well under racing conditions.
If you have a dedicated race car that's never left outside in the cold you really should be running a dedicated
race onlyoil, they're just that good.
I see some excellent oils in this thread. Good thread, but surprised nobody mentioned Joe Gibbs, one of the undisputed champions of racing oil development.
http://www.drivenracingoil.com/dro/xp3.html