My gc8 has 297xxx on the clock and I've taken it on a track day or two (and another this Sunday). I change the oil every 5000/10,000km or generally after a track day. She is still going strong In saying the the steering wheel and gearknob is to shit the drivers car has a rip in an there are rattles :/ but in terms of reliability I could t ask for more (touch wood)

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1997 White GC8 WRX - 3" TBE, Apexi pod, V6 STI TMIC, Kei Office coilovers, Whiteline F strut brace, GReddy Profec B Spec II, 2004 F&R brakes..