1991 Mercury Capri Oil Type & Capacity
The 1991 Mercury Capri oil type depends on the engine: the Base, Automatic takes 5W-30 (3.5 quarts with filter); the Base, Standard takes 5W-30 (3.5 quarts with filter); the XR2 takes 5W-30 (3.7 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- Base, Automatic: 5W-30, 3.5 quarts with filter
- Base, Standard: 5W-30, 3.5 quarts with filter
- XR2: 5W-30, 3.7 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, Automatic — Normally Aspirated | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 3.50 QTS. | 3.20 QTS. | Dipstick is used to determine exact fill requirements. |
| Base, Standard — Normally Aspirated | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 3.50 QTS. | 3.20 QTS. | Dipstick is used to determine exact fill requirements. |
| XR2 — Turbocharger | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 3.70 QTS. | 3.20 QTS. | Dipstick is used to determine exact fill requirements. |
Buy the right oil
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More specs & repair guides for your Capri
1991 Mercury Capri factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
5.3 quarts (5.01 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water
Frequently asked questions
What type of oil does a 1991 Mercury Capri take?
It depends on the engine: Base, Automatic uses 5W-30; Base, Standard uses 5W-30; XR2 uses 5W-30.
How much oil does a 1991 Mercury Capri take?
Capacity depends on the engine: Base, Automatic holds 3.5 quarts with filter; Base, Standard holds 3.5 quarts with filter; XR2 holds 3.7 quarts with filter.
Can I use synthetic oil in my 1991 Mercury Capri?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Mercury Capri. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.