i have a 2001 6.8l v10 and have nothing but problems. now i got a knocking noise and the oil has water in it. i have no clue what is wrong and on start up it blows white smoke till its warm i have looked at the coolent lvls and they have not changed. the oil pressure is fine while driving but at idle and stop lights and stop sighns it drops and the light comes on. i have not had a cheak engine light yet? what could be wrong? i have blown plugs 5 time 3 coils and 2 head replacments. i hape its just old oil or bad oil i have no clue it is due for an oil change but would just oil oil make all this **** happen i also am seeing oil comming form the intake on the throtle body but the oil beathers are right there too. whats anyones best guess!?!?!?