1998 CADILLAC CONCOURS User Comment / Complaint

1998 cadillac deville concours. northstar 4.6l v8 i have made numerous complaints about the oil consumption of this vehicles engine. only to receive the brush off from the dealership about gm's allowable northstar consumption. this engine is consuming 4 qts per month on average and is not acceptable in my book. what do i do now ? no manufacturers warranty or extended left to help and only 80,000 miles on this vehicle. i definitely believe that this vehicle was a lemon from the get go and that gm knows these engines have problems. i'm trying to buy american made products but with problems like this it's getting difficult to do this. hoping i can get some resolution to this problem.