Meant for R-134a cars, it also has a leak sealer and additive than can help stop small leaks in hoses, gaskets and o-rings. It replaces not just the AC refrigerant lost, but the oil that can leak ...

If your car's air conditioner blew ice-cold air last year but barely cools now, chances are it lost some refrigerant over the winter. That happens in older vehicles when the aging seals contract ...