1999 Ford Mustang Oil Type & Capacity: 5W-20 (5.0 quarts)
The 1999 Ford Mustang takes 5W-20 motor oil — 5.0 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-20 — 5.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, 2D Convertible, Automatic | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| Base, 2D Convertible, Standard | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| Base, 2D Coupe, Automatic | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| Base, 2D Coupe, Standard | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| Cobra, 2D Convertible | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| Cobra, 2D Coupe | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| GT, 2D Convertible, Automatic | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| GT, 2D Convertible, Standard | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| GT, 2D Coupe, Automatic | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| GT, 2D Coupe, Standard | SAE 5W-20 Super Premium Motor Oil | 5.00 QTS. | — | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
More factory specs & repair guides for your Mustang
🛞 1999 Ford Mustang Tire Size & Pressure →🌧️ 1999 Ford Mustang Wiper Blade Sizes →💡 1999 Ford Mustang Light Bulb Sizes →📖 1999 Ford Mustang Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.8 quarts (11.16 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water. DO NOT use FORD Extended Life Engine Coolant (orange color).
Frequently asked questions
What type of oil does a 1999 Ford Mustang take?
The 1999 Ford Mustang takes 5W-20 motor oil (SAE 5W-20 Super Premium Motor Oil), per the factory service manual.
What is the oil capacity of a 1999 Ford Mustang?
The 1999 Ford Mustang oil capacity is 5.0 quarts with a filter change.
How often should I change the oil in my 1999 Ford Mustang?
Most 1999 Ford Mustang owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — Ford recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1999 Ford Mustang?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1999 Ford Mustang. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.