How much refrigerant does a Ford Mustang A/C system hold?

The 2018 Ford Mustang (4 Cyl. 2.3 Eng.) holds 19.2 oz of R-1234yf as a complete system charge. That is the amount for an empty, evacuated system, not for a top-off.

Can I put R-134a in a car that uses R-1234yf?

No. The two use different service fittings on purpose and different oils. Charging the wrong refrigerant can damage the compressor and is illegal in the US under EPA rules.

Can I recharge the A/C myself?

A DIY can with a gauge can top off a slightly low R-134a system. If the system is empty it has a leak, and adding refrigerant without fixing it wastes the can. A full charge needs the system evacuated and weighed in, which is a shop job.

Ford Mustang A/C refrigerant type and capacity

GarageDex's A/C data shows the 2018 Ford Mustang (4 Cyl. 2.3 Eng.) uses 19.2 oz of R-1234yf refrigerant with PAG Oil compressor oil. Earlier years used R-134a, so check the year row below.

Shop R-1234yf Match the type on your under-hood decal

Key takeaways

2018 Ford Mustang: 19.2 oz of R-1234yf, 4 oz of PAG Oil oil.
The charge is a full-system amount; a top-off adds far less.
This model switched refrigerant types over its life (R-1234yf, R-134a) - use your year's row.
A system that is empty has a leak - fix it before charging.

Ford Mustang A/C refrigerant and oil by year
Years	Engine	Refrigerant	Charge	Compressor oil
2018	4 Cyl. 2.3 Eng.	R-1234yf	19.2 oz	PAG Oil 4 oz
2018	4 Cyl. 2.3 Eng.	Decal	See decal	PAG-46 3.4 oz
2018	8 Cyl. 5.0 Eng.	R-1234yf	19.2 oz	PAG Oil 4 oz
2018	8 Cyl. 5.2 Eng.	R-1234yf	24 oz	PAG Oil 4 oz
2015 to 2017	4 Cyl. 2.3 Eng.	R-134a	20.8 oz	PAG-46 4 oz
2015 to 2017	6 Cyl. 3.7 Eng.	R-134a	20.8 oz	PAG-46 4 oz
2015 to 2017	8 Cyl. 5.0 Eng.	R-134a	24 oz	PAG-46 4 oz
2015 to 2017	8 Cyl. 5.2 Eng.	R-134a	24 oz	PAG-46 4 oz
2014	6 Cyl. 3.7 Eng.	R-134a	21.12 oz	PAG-46 4 oz
2014	8 Cyl. 5.0 Eng.	R-134a	21.12 oz	PAG-46 4 oz
2014	8 Cyl. 5.8 Eng.	R-134a	21.12 oz	PAG-46 4 oz
2013	6 Cyl. 3.7 Eng.	R-134a	21 oz	PAG-46 4 oz
2013	8 Cyl. 5.0 Eng.	R-134a	21 oz	PAG-46 4 oz
2013	8 Cyl. 5.8 Eng.	R-134a	21 oz	PAG-46 4 oz
2011 to 2012	6 Cyl. 3.7 Eng.	R-134a	21 oz	PAG-46 4 oz
2011 to 2012	8 Cyl. 5.0 Eng.	R-134a	21 oz	PAG-46 4 oz
2011 to 2012	8 Cyl. 5.4 Eng.	R-134a	21 oz	PAG-46 4 oz
2010	6 Cyl. 4.0 Eng.	R-134a	21 oz	PAG-46 4 oz
2010	8 Cyl. 4.6 Eng.	R-134a	21 oz	PAG-46 4 oz
2010	8 Cyl. 5.4 Eng.	R-134a	21 oz	PAG-46 4 oz
2009	6 Cyl. 4.0 Eng.	R-134a	26 oz	PAG-46 7 oz
2009	8 Cyl. 4.6 Eng.	R-134a	26 oz	PAG-46 7 oz
2009	8 Cyl. 5.4 Eng.	R-134a	26 oz	PAG-46 7 oz
2007 to 2008	All Eng.	R-134a	26 oz	PAG-46 7 oz
2005 to 2006	All Eng.	R-134a	31 oz	PAG-46 7 oz
1997 to 2004	All Eng.	R-134a	34 oz	PAG-46 8.5 oz
1994 to 1996	All Eng.	R-134a	34 oz	PAG-46 7 oz

Recharge supplies for your Ford Mustang

Buy the refrigerant type shown for your year and confirm it against the under-hood decal. R-1234yf cans cost more and need a matching coupler.

R-1234yfR-1234yf can with a gauge and couplerShop cans Manifold gauge setReads high and low side pressure properlyShop gauges Leak detection kitFind the leak before you spend on refrigerantShop kits

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Same car, other specs: Ford Mustang specs hub.

Other Ford models

Source: Four Seasons - Compressor / System Refrigerant & Lubricant Specs. The under-hood A/C decal is the primary source for your exact car - it overrides any table. Charges assume a clean system with a new drier.