(MONEY Magazine) – Thank you for the wonderful article ((''How to Save on a New Car'')) in August. I am here to tell you I saved $3,000 just from reading it. You should have seen me negotiating at the car dealers. I did not know myself. Geri Zienty Naperville, Ill.

I read with interest Jerry Edgerton's article about how to save on a new car. I take strong exception to his comment about root canal ''as one of life's least pleasurable experiences.'' The fact is that root canal therapy is one of the least painful dental procedures. It is an important dental procedure that saves thousands of teeth a year. Root canal treatment in reality renders comfort quickly from ''one of life's least pleasurable experiences,'' a toothache. David M. Gallin, D.D.S. New York City