I had a person I know tell me about a car they got from there aunt that had 96,000 miles and was leaking oil so bad that she had to keep 4 quarts of oil in the pan instead of 5 because it was leaking so bad, with 4 quarts in there it still leaked a little bit but nothing like it did with 5 quarts, I told her about Auto-Rx, I changed her oil and filter and added a bottle of Auto-Rx, a few hundred miles later I talked to her and she said the car was running smoother and not leaking anymore oil, when she got to 2500 miles I changed the oil and filter, she let me drive the car, the engine was smooth and it ran like it was brand new, before we put Auto-Rx in I told her you can either change the rear main seal and all the other gaskets on the engine or try Auto-Rx, I had my doubts because this engine was 30 years old, but as usual I was wrong, if your car is a leaker Auto-Rx can help it stop leaking as long as the seals are not ripped or severly damaged, before her car was caked with oil underneath, we cleaned it off and now underneath it is virtually spotless.