why is what it seems to be white smoke coming out my tailpipes

when I accelerate the white smoke is gone but when I was at mcdonalds drive through on the break it was some sort of what look like white smoke coming out my tail pipes when I put it in park right there and then in the drive through with my car still on it stopped smoking but when I put it in drive it started back up but when I accelerated it stopped then when I put oil in it it stopped all together but while it was smoking the car act like it wanted to give out with a sort of clicking niose though after I put a quart of oil it stopped acting up. what could be the problem