1999 Mercury Mystique Oil Type & Capacity
The 1999 Mercury Mystique oil type depends on the engine: the GS, 2.0 3, Automatic takes 5W-20 (4.5 quarts with filter); the GS, 2.0 3, Standard takes 5W-20 (4.5 quarts with filter); the GS, 2.5 L takes 5W-20 (5.8 quarts with filter); the LS, 2.0 3 takes 5W-20 (4.5 quarts with filter); the LS, 2.5 L, Automatic takes 5W-20 (5.8 quarts with filter); the LS, 2.5 L, Standard takes 5W-20 (5.8 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- GS, 2.0 3, Automatic: 5W-20, 4.5 quarts with filter
- GS, 2.0 3, Standard: 5W-20, 4.5 quarts with filter
- GS, 2.5 L: 5W-20, 5.8 quarts with filter
- LS, 2.0 3: 5W-20, 4.5 quarts with filter
- LS, 2.5 L, Automatic: 5W-20, 5.8 quarts with filter
- LS, 2.5 L, Standard: 5W-20, 5.8 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| GS, 2.0 3, Automatic — 2.0L Eng | SAE 5W-20 Premium Synthetic Blend Motor Oil | 4.50 QTS. | 4.00 QTS. | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| GS, 2.0 3, Standard — 2.0L Eng | SAE 5W-20 Premium Synthetic Blend Motor Oil | 4.50 QTS. | 4.00 QTS. | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| GS, 2.5 L — 2.5L Eng | SAE 5W-20 Premium Synthetic Blend Motor Oil | 5.80 QTS. | 5.30 QTS. | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| LS, 2.0 3 — 2.0L Eng | SAE 5W-20 Premium Synthetic Blend Motor Oil | 4.50 QTS. | 4.00 QTS. | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| LS, 2.5 L, Automatic — 2.5L Eng | SAE 5W-20 Premium Synthetic Blend Motor Oil | 5.80 QTS. | 5.30 QTS. | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
| LS, 2.5 L, Standard — 2.5L Eng | SAE 5W-20 Premium Synthetic Blend Motor Oil | 5.80 QTS. | 5.30 QTS. | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. |
Buy the right oil
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More specs & repair guides for your Mystique
1999 Mercury Mystique factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
7.5 quarts (7.09 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water
Frequently asked questions
What type of oil does a 1999 Mercury Mystique take?
It depends on the engine: GS, 2.0 3, Automatic uses 5W-20; GS, 2.0 3, Standard uses 5W-20; GS, 2.5 L uses 5W-20; LS, 2.0 3 uses 5W-20; LS, 2.5 L, Automatic uses 5W-20; LS, 2.5 L, Standard uses 5W-20.
How much oil does a 1999 Mercury Mystique take?
Capacity depends on the engine: GS, 2.0 3, Automatic holds 4.5 quarts with filter; GS, 2.0 3, Standard holds 4.5 quarts with filter; GS, 2.5 L holds 5.8 quarts with filter; LS, 2.0 3 holds 4.5 quarts with filter; LS, 2.5 L, Automatic holds 5.8 quarts with filter; LS, 2.5 L, Standard holds 5.8 quarts with filter.
Can I use synthetic oil in my 1999 Mercury Mystique?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1999 Mercury Mystique. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.