comprsion is ok and any way it wouldnt show on the test as it will not show if th oil ring ia fucked only if comprision is down i hear what your saying but comprsion can still be good even if the oil ring is fucked ..ohh and if you lift the dip stick up it spits out oil and if you rev it with out the dip stick you can end up coverd in oil please ho many people say ring s i do and how many say turbo i will carry out work acorrdingly to the amount of people that say turbo or ring so come on people give your vote