Well, it has finally gotten warm enough around here for me to turn on my a/c and all I got was warm air. Was running very cold before I stopped using it for the winter. I have 140,000 miles and have never recharged the system.

My questions are:

- Does anyone prefer any specific brand of R134a refrigerant?
- Do I have a leak or is it normal for it to peter out after not being used for several months?