Hi, I recently purchased a GTI,(2007 bwa engine) I know they all consume oil but my consume abnormal much oil it consumes about 1 liter to 600 km, from the exhaust pipe saw no blue or white smoke, the only black when I press the pedal to the metal, the car going and pulls really good dont know what the problem is, please help ,,, PS sorry my for english I am from Croatia .Thx.