The 2021 Ford Mustang has an EPA-estimated fuel economy of 21 mpg city/30 mpg highway/25 mpg combined with the 2.3L EcoBoost engine, 15 mpg city/25 mpg highway/19 mpg combined with the 5.0L Ti-VCT V8 engine, and 14 mpg city/23 mpg highway/17 mpg combined with the 5.2L Ti-VCT V8 engine.