disappearing oil?
 

I have a 93 grand marquis i got it from my grandma, it was never abused the engine only has 36k on it and it has a mysterious oil disappearing... it shouldn't be burning it for the low miles it has it runs great doesn't smoke at all and i really don't see any oil drops where it sits. i end up having to put in a quart every two weeks or so.. does anyone have any ideas? thanks for any help!

pcv valve

ihave replaced it multiple times, could it be something else? is it possible i could block it off somehow and see if it gets better? the engine underneath has no leaks still, still loosing oil at a pretty good pace.

does it smoke any? the valve seals or valve guide seals go bad causing car to smoke... typical issue on early model 4.6L engines

i think it would be the problem. you'd better have somebody repair it.

i have not faced this type of issue and i think it is a typical problem.some more suggestions please.