starbuck, i reckon if you use this oxy white stuff you'll see a marked difference in your poor sheets, it contains sodium carbonate peroxyhydrate which must be a bleaching agent. if i don't have enough whites for a whole wash and occasionally put a white in with an ordinary wash then i can really see a difference. it's not that the colours run, it's simply because they haven't had this oxy stuff added and it takes a couple of oxy washes to get them back to the sparkling white they used to be.
i'm sure the aspirin thing works but i'm happy to keep on with what i use as it's so effective.