the last time he check his spark plug, he told me that it has coolant on it. actually it was a mixture with oil and coolant. and once he cleaned it up and put new spark plug it ran good for about 3 months....and it will acted up again. so now it didn't have no coolant...just whole bunch of oil fill up 5 and 6 plug. can he still able to drive the car temporary awhile the car is smoking white?...and what is his chance or remove it....? he is really sick worried.