What do you use to put freon in a car?
You don't use Freon in a car. Freon is a brand name for a chlorofluorocarbon (CFC) refrigerant that was phased out in the mid-1990s due to its harmful effects on the ozone layer. Modern cars use a refrigerant called HFC-134a, which is not harmful to the ozone layer. To recharge the air conditioning system in a car, you would use a refrigerant recharge kit that is specifically designed for HFC-134a.