I noticed tonight that my 280zx ate about 2 quarts of oil since I last checked it (about a week ago). The only reason I noticed it was because my oil gauge went nuts. Now the oil gauge is reading much higher than it normally does. I always keep the oil inbetween the full and empty points. I'm not burning any oil that I know of through the exhaust and I haven't seen any oil spots on the ground. Any suggestions would be very appreciated.