Refrigerant Oil Adding

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: During normal air conditioning (A/C) operation, oil is circulated through the system with the refrigerant, and a small amount is retained in each component. If certain components of the system are removed, some of the refrigerant oil will go with the component. To maintain the original total oil charge, it is necessary to compensate for the oil lost by adding oil to the system with the new part.

Refer to the chart below for refrigerant oil adding amounts and methods of installation.

Component	PAG Oil Amount	Method of Adding
A/C Compressor	Varies	Add directly to A/C compressor before installation
Suction Accumulator or Receiver/Drier	Varies	Add directly to the suction accumulator inlet port or inject to the low-side port during system charging
Evaporator Core	89 ml (3 fl oz) added to the amount collected during refrigerant recovery	Add directly to the evaporator core inlet tube or inject to the low-side port during system charging
Condenser Core	60 ml (2 fl oz) added to the amount collected during refrigerant recovery	Add directly to the condenser core inlet or inject to the low-side port during system charging
Evaporator Core Orifice or Thermostatic Expansion Valve	60 ml (2 fl oz) added to the amount collected during refrigerant recovery	Inject to the low-side port during system charging
A/C Pressure Relief Valve	60 ml (2 fl oz) added to the amount collected during refrigerant recovery	Inject to the low-side port during system charging
Refrigerant Hose/Line	60 ml (2 fl oz) added to the amount collected during refrigerant recovery ^a	Inject to the low-side port during system charging
O-ring Leak Repair	60 ml (2 fl oz) added to the amount collected during refrigerant recovery ^b	Inject to the low-side port during system charging
Port Leak Repair	60 ml (2 fl oz) added to the amount collected during refrigerant recovery	Inject to the low-side port during system charging

^a If an excessive amount of refrigerant oil is lost due to a hose rupture/separation or other damage, the total system refrigerant oil capacity must be added.

^b The amount specified may be used for one or multiple O-ring leak repairs. Do not multiply the refrigerant oil amount by the number of O-ring leaks being repaired.