1991 Mercury Sable Oil Type & Capacity
The 1991 Mercury Sable takes 5W-30 motor oil — 4.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| GS, 4D Sedan, 3.0 U | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| GS, 4D Sedan, 3.8 4 | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| GS, 4D Wagon, 3.0 U | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| GS, 4D Wagon, 3.8 4 | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| LS, 4D Sedan, 3.0 U | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| LS, 4D Sedan, 3.8 4 | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| LS, 4D Wagon, 3.0 U | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
| LS, 4D Wagon, 3.8 4 | SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.50 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Sable
1991 Mercury Sable factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
11.0 quarts (10.4 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water
Frequently asked questions
What type of oil does a 1991 Mercury Sable take?
The 1991 Mercury Sable takes 5W-30 motor oil (SAE 5W-30 (Preferred) (Below 0Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F)), per the factory service manual.
How much oil does a 1991 Mercury Sable take?
The 1991 Mercury Sable holds 4.5 quarts with a filter change.
Can I use synthetic oil in my 1991 Mercury Sable?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Mercury Sable. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.