How do you put freon in a 1998 Dodge Neon?

There are several options in the market. I have tried can refills which include Refrigerant, Oil, Stop Leak, Leak Detector and O-Ring conditioner all in the same can. It works effectively as long as you don't have significative leaks in your system, fow which I recommend to take it to a specialized service first to check only for leaks, that process is usually quick and cheap. Then, if you want to save money, do the refilling yourself. Look for the R-134a refill type. Good luck.