If you used one quart in 5,000 miles, that is nothing to worry about. Most manufacturers indicate a quart of oil in 1,500 miles is acceptable.
Where does it go? If there are absolutely no leaks, it does get burned to some extent in the combustion chamber. Because of the small amount being burned, the catalytic converter likely takes care of the issue and no smoke is ever seen.
Oil can evaporate over time. It is more likely to happen above 212 F which is a normal operating temp for a vehicle engine. However, the process is very slow.
I hope that helps.
Let me know if you have other questions.
Wednesday, September 16th, 2020 AT 7:16 PM