Sure. Burned or blew it out. Crappy metallurgy, sloppy tolerances, and Neolithic engineering. That's why you checked your oil once a week on everything, even new cars. Before pcv valves engines had draft tubes. A small diameter tube from either the crankcase or the valve cover, that dropped straight down to vent under the car. Air was taken in through the breather cap and internal built up gasses vented out the tube. Along with a small amount of oil, of course. Not so long ago you were lucky to get 70k out of a car before rebuilding the engine. You could get a short block for $200-300, or long block for about $700. Today's cars are so much better and safer but the trade off is it takes $1000s of dollars in diagnostic tools and a lot more knowledge to maintain them.