i use RP. and will continue to do so untill i cant afford it any more or they stop making it. heck i even used a RP oil filter this time. and at times i don't change my oil for like 7k miles.
IMO: no point in running either on a daily or semi-modded car period ... you can if you want to throw $$ away ... simply just use mobil1 or castrol and call it a day