1991 Saturn SL Oil Type & Capacity: 5W-30 (4.0 quarts)
The 1991 Saturn SL takes 5W-30 motor oil — 4.0 quarts with a filter change, per the factory service manual.
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Automatic | API - SAE 5W-30 (Preferred) (Below 0Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| Standard | API - SAE 5W-30 (Preferred) (Below 0Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
More factory specs & repair guides for your SL
🛞 1991 Saturn SL Tire Size & Pressure →🌧️ 1991 Saturn SL Wiper Blade Sizes →💡 1991 Saturn SL Light Bulb Sizes →📖 1991 Saturn SL Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
7.0 quarts (6.62 L) — 50/50 mixture of DEX-COOL and water
Frequently asked questions
What type of oil does a 1991 Saturn SL take?
The 1991 Saturn SL takes 5W-30 motor oil (API - SAE 5W-30 (Preferred) (Below 0Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1991 Saturn SL?
The 1991 Saturn SL oil capacity is 4.0 quarts with a filter change.
How often should I change the oil in my 1991 Saturn SL?
Most 1991 Saturn SL 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 — Saturn recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1991 Saturn SL?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Saturn SL. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.