I have an 08 6.4 with a 4" mbrp turbo back exhaust with a sct tuner and sometimes i stack my ts perforformance turn knob on top of the sct. Lately i have been noticing some blue smoke at idle not much though but it gets worse when i get on it, mixed with a little white and black. I know what all the smoke represents blue-oil, white-turbo, black-burnt fuel. Idc about the black but the blue is concerning me. Any ideas???