A qt.in two weeks is a lot. You would be lucky if it is just the Crankshaft seal behind the pulley. Spray down the area with some brake kleen or the like. Then run the engine and look for the leak to appear while the area is clean. It probably is a combination of leaking front cover gaskets and oil pan gasket. The oil sending unit is a leaker also but thats located above the air conditioning compressor. I also have a leak that I have had since the car was new. I have never had to add oil between changes though (3000 miles). I have replaced the oil pan gasket (2 times, once by the dealer under warranty)and the oil sending unit. I now know the main source to be the front cover gaskets. I am not looking forward to doing that job, but will soon as the smell of burning oil through the vents is getting worse.
