1999 Ford Mustang Oil Capacity

The 1999 Ford Mustang’s engine oil capacity and recommended viscosity depend on which engine is installed.

For the 3.8L Essex V6 SPI, the listed capacity is 5.0 qt with 5W-20 oil. For the 4.6 L 2-Valve, it is 6.0 qt, also with 5W-20. These figures apply to the engine options listed for this year; the capacity changes by engine, while the listed viscosity is the same for both.

Treat the capacity as a reference when servicing the engine, and confirm the correct figure for your vehicle on the door jamb or in the owner’s manual if your engine or configuration is uncertain.

3.8L Essex V6 SPI: 5 qt · 4.6 L 2-Valve: 6 qt

Catalog dataManufacturer figures stored on configuration rows

Engine

3.8L Essex V6 SPI: 5 qt · 5W-20

5 qt · 5W-20 · 3.8L Essex V6 SPI
6 qt · 5W-20 · 4.6 L 2-Valve

Questions

Does oil capacity vary by engine?: Yes. Stored capacities differ by engine label.
How much oil is stored for each engine?: 3.8L Essex V6 SPI: 5 qt; 4.6 L 2-Valve: 6 qt