Good assumption and info but when I had the AMSOIL Cone filter on the car DID respond a lot smoother and had more revving than before, I had to remove the filter cause it was to large for the area and was damaging the paint job. Sorry amigos will not use a K&N cuase of the oil issue plus I had a previous problem with my 02 MCS where the oil ran thru the tubes and MESSED up my MASS Flow Sensor, luckily the MINI mechanic was a fellow Puerto Rican and let me slide, he put down in the system that my MASS flow sensor was defective!!!
