Burning oil in a 1973 Cadillac seems legit.
Drive an old boat like that around for long and you’ll stop at every gas station and put in a quart of oil. Worn engines simply burn and leak oil, often causing heavy smoke and the putrid odor of crusty black tar.
Drivers of those old cars don’t get too angry at the oil consumption because they know it just comes with the territory of having the pleasure of driving a Nixon-era automobile.
A 2013 car should never burn a quart of oil between oil changes.