put it in idle and then put a dollar bill over hte exhaust tip. if your exhaust is not leaking, and the valves are good, the dollar will rhythmically flap. if the dollar pops, you have burned valves.
if you have someone start it in the morning with you watching the tail pipe and blue smoke comes out at start up, the valve seals leak a little while sitting. it if smokes on deceleration, blue smoke, the valve seals are leaking.
if it smoke while driving or idling, all the time, and is blue smoke, the rings are not sealing properly and you will probably have low or bad compression on some cylinders or all cylinders
A cowardly leader is the most dangerous of men- Stephen King.
"Just because something isn't a lie does not mean that it isn't deceptive. A liar knows that he is a liar, but one who speaks mere portions of truth in order to deceive is a craftsman of destruction". --I am not sure who said this but it properly describes our president.