I just purchased a 2005 STI with 24k miles. When I checked the oil it was 2 quarts low. So I filled it up and about 100 miles later checked it again and I had lost about 1/4 of a quart already. There is no visible external leaks. So I checked the service history at the dealership and the previous owner had took it in complaining that the engine was noisy. When the dealership drained the oil there was only 1/2 quart in the pan! So he burned through all of the oil! I am going to have the dealership do an oil consumption test and try to get them to warranty the problem. Does anyone have any ideas why this would be happening? Has anyone heard of a similar problems?