How much transmission fluid does a 2020 Ford Mustang take?

12.7 quarts as a total fill for the 10R80 transmission (2.8 to 12.7 quarts across this year's engines). A drain-and-refill without removing the pan replaces roughly a third to half of that, so refill to the level check point rather than pouring in the whole figure.

What transmission fluid does a 2020 Ford Mustang use?

The source names WSS-M2C949-A for this year. Use a fluid that states that specification on the bottle.

What brake fluid does a 2020 Ford Mustang take?

DOT 4, per the manufacturer note. It is also printed on the brake fluid reservoir cap.

2020 Ford Mustang transmission fluid capacity and fluid specs

GarageDex's fluid data shows the 2020 Ford Mustang (2300-ECOBOOST-I4 2.3L 4-cylinder S550) uses the 10R80 automatic transmission, which holds 12.7 quarts of fluid as a total fill, specified as WSS-M2C949-A. Other engines on this year hold 2.8 to 12.7 quarts - see the table. Brake fluid is DOT 4.

Shop WSS-M2C949-A fluid Match the specification on the bottle to your manual

Key takeaways

Transmission: 10R80 automatic transmission, 12.7 qt total fill, WSS-M2C949-A fluid.
Total fill is the whole system; a drain-and-refill takes a third to half.
Brake fluid: DOT 4.
The fluid specification is named by the source - buy a fluid that lists it.

2020 Ford Mustang fluids by engine
Engine	Transmission	Total fill	Fluid spec	Brake fluid	Gear oil
2300-ECOBOOST-I4 2.3L 4-cylinder S550	10R80 automatic	12.7 qt	WSS-M2C949-A	DOT 4	rear GL-5 75W-85 1.6 qt
2300-ECOBOOST-I4 2.3L 4-cylinder S550	10R80 automatic	12.7 qt	WSS-M2C949-A	DOT 4	rear GL-5 75W-85 1.6 qt
5000-COYOTE-V8 5L 8-cylinder S550	MT82 manual	2.8 qt	per owner's manual	DOT 4	rear GL-5 75W-85 1.6 qt
5000-COYOTE-V8 5L 8-cylinder S550	10R80 automatic	12.7 qt	WSS-M2C949-A	DOT 4	rear GL-5 75W-85 1.6 qt

Fluids for the 2020 Ford Mustang

Buy fluid that states the specification your manual names. Multi-vehicle fluids list the specs they meet on the back label - if yours is not listed, it is the wrong bottle.

WSS-M2C949-A fluidYou need about 13 quarts for a full fillShop fluid DOT 4 brake fluidA quart covers a full flushShop brake fluid Fluid transfer pumpMost modern transmissions have no dipstick tube - you fill from belowShop pumps

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Other 2020 Ford Mustang specs

All specs Engine oil Coolant capacity Maintenance schedule

Other Mustang years

2026 2025 2024 2023 2022 2021 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005

Source: World's Best Oil (AMSOIL dealer cross-reference). Capacities are total system fills; a drain-and-refill takes less. Where no fluid specification is shown, the source lists only a catalog code, so use the specification printed in your owner's manual - the wrong transmission fluid damages a transmission.