I run Royal Purple 5-30 in my Nismo and have run Royal Purple in all my drift/race cars, and my other vehicals trucks and such, but never for my WRX.
I also change my oil often usually just before 3K, and if I know it's going to be a hot weather event I'll change it out before.
Moble 1 sucks in my opinion, I have used it quite a few times and hated it. I wouldn't put it into any of my cars even it if was given to me.
I heard good things about Eneos, Motul, and Red Line, but never have tried them.
I pitted for dirt modified race team for a few years, and all they used was Red Line. We also changed the oil after every race.
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