hi guys, bmw 2006 x5 30d, i replaced the oil and put in castrol edge 5w40sn. when i finished up i read on the bottle not for vehicles with dpf. nobody seems to know whether or not this vehicle has a dpf, do i drain the brand new oil and replace it with castrol edge 5w30 llo4 or leave the 5w40sn llo1 in. i just dont know. hope someone can help. paul