roofles

Finally, this has just been resolved. the story is this:
car shipped with ecu that was not set to run with 91 octane gas.
car was detonating a lot when it was first purchased.
octane booster was religiously used and finally ecu was replaced with the propper one.
turns out head gasket had been damaged from the prior detonation, coolant gets into oil, and then we get the sad ending.

so why did it take so long? get this:
subaru usa doesnt sell crate engines for the STi, so for two months subaru sent the dealership piece by piece for them to assemble a new engine for this car.

ultimately, everything was underwarranty as the cause was determined to be the improper ecu settings.

ps
not sure if the problem with the gas was actually too low of an octane rating or that we just have shit gas out here. both sound like good candidates to me, heh.