1986 Cadillac Eldorado Oil Type & Capacity: 5W-30 (5.0 quarts)
The 1986 Cadillac Eldorado takes 5W-30 motor oil — 5.0 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 5.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Eldorado — 4.1L Eng | SAE 5W-30 (Beloow -20Deg.F to 60Deg.F), 10W-30 (Preferred) (0Deg.F to Above 100Deg.F), 15W-40 (10Deg.F to Above 100Deg.F) 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
More factory specs & repair guides for your Eldorado
🛞 1986 Cadillac Eldorado Tire Size & Pressure →🌧️ 1986 Cadillac Eldorado Wiper Blade Sizes →💡 1986 Cadillac Eldorado Light Bulb Sizes →📖 1986 Cadillac Eldorado Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
12.6 quarts (11.92 L) — 50/50 mixture of Ethylene Glycol Base Antifreeze and water. GM Specification 1825-M.
Frequently asked questions
What type of oil does a 1986 Cadillac Eldorado take?
The 1986 Cadillac Eldorado takes 5W-30 motor oil (SAE 5W-30 (Beloow -20Deg.F to 60Deg.F), 10W-30 (Preferred) (0Deg.F to Above 100Deg.F), 15W-40 (10Deg.F to Above 100Deg.F) 30 (40Deg.F to Above 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1986 Cadillac Eldorado?
The 1986 Cadillac Eldorado oil capacity is 5.0 quarts with a filter change.
How often should I change the oil in my 1986 Cadillac Eldorado?
Most 1986 Cadillac Eldorado 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 — Cadillac recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1986 Cadillac Eldorado?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1986 Cadillac Eldorado. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.