leaking oil on 1993 Plymouth Voyager

I have to put about two courts of oil in a week. What do you think is wrong?

2 answers
I would start with the Valve cover gaskets first, unless you have already done them.
A little more info needed and possibly some more testing. First off, is it leaking badly under the vehicle? If so, something has failed like a gasket or sender. Otherwise, the oil is being consumed by the engine. Possible causes for consumption is valve guides, rings, or the PCV system.