yeah and my advise is listen for any faint knocking from the engine. Hold the revs at about 3k and rock on and off the gas lightly an lisen is its makes any stranges noises when your rocking the rev! dont want you to da a bearing on the way home now do we! another good hint is take a look at what oil filter is on it. That will give you some idea on how its looked afer and possibly what oils its bee run on. Subaru filter= good, repco= not so good and prol lasnt had decent quality oil in it. Thats my theory and its worked gud few times before!
Lookin after advice... Good engine oil + genuine subaru oil filter is a very good place to start !