2002 Chevy Prizm using oil

Hello and thanks for donating

If you are having to add to oil each month than it must be leaking somewhere, either internally or externally. If tehre are no wet spots / signs of an external leak than most likely it is internal. Internal leaks are usually caused by worn piston rings and/or valve seals. Do you notice any blue-ish smoke from the exhaust either at start-up only or anytime while engine is running?