hey, i used to share a 98 VW passat with my sister, back when i was 16. i left for 2 months to go to japan cause thats what i did for my summer break. when i got back the car was absolutely ruined my sister drove the car for like a month without any motor oil and it completely destroyed the engine and the compression was all screwed up, basically it was as good as a write off. what im wondering is if this were to happen to my wrx (god forbid it never does, i watch my oil very meticulously) is there a way to restore compression. like changing the piston and piston rings? im also ask this cause my wrx is getting old it has like 150,000 km on it.