This is the second time this has happend to me...Sometimes when I change my oil, after I finish the job the oil light stays on and the motor sounds like it is rapping a little bit. The last time it happend I brought it to the shop and they said all they did was undo the oil line and there was just an air bubble in the oil line. Does anyone know what might be causing this to happen or which oil line i should check first for the air bubble? Thanks