Howdy,
The general rules of scooby ownership are,
Run her on Maxol E5 unleaded (99ron) just incase she is prone to detination!
Service regularly with genuine subaru oil filter and a good oil (Mobil S 10w40 or motul 15w50) there are loads of others, I just know them off the top of my head!
Don't rev her like a vteck, use the turbo torque,
Don't do dohnuts, all the oil will go to one side of the sump and if the oil pick up just sucks up air, you will get oil starvation and your bearings and turbo can suffer! a baffled sump will solve this issue,
Let her warm up before driving her on, ie. start up and leave home keep the revs low and only gentle throttle, untill the enging temp is normal, then boot it,
Let her cool down after a drive, ie. take it handy for the last few minutes, keep the revs low and only gentle throttle
Typically you should remap to accomidate new engine mods, to get the most out of them, it's wrth it even if it's just for piece of mind,
Scoobies are like lego, alot of bits are interchangeable, so an sti type r VF28 would bolt straight on (to get the most out of your remap) newage brembos just bolt on,
Scoobies are criticised for their tendancy to understeer, simply dialing in some/all the negative camber on the front wheels will cure that, but a good geometry setup would be best!
Lastly, I would highly recommend using a mechanic with a motorsport back ground, ie. who actually run a race car, there really isn't any substatute for experiance!
Hope you enjoy the club man! and €50 upgrades you to full membership which gets you invited to all the monthly meets, and events, and entitles you to subsidies for events like karting, rolling roads days, trackdays, etc etc
Dan