1988 Cadillac Eldorado Oil Type & Capacity: 5W-30 (5.5 quarts)
The 1988 Cadillac Eldorado takes 5W-30 motor oil — 5.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 5.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Eldorado — 4.5L Eng | SAE 5W-30 (Below -20Deg.F to 60Deg.F), 10W-30 (Preferred) (0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), 30 (40Deg.F to over 100Deg.F) | — | 5.00 QTS. | — |
More factory specs & repair guides for your Eldorado
🛞 1988 Cadillac Eldorado Tire Size & Pressure →🌧️ 1988 Cadillac Eldorado Wiper Blade Sizes →💡 1988 Cadillac Eldorado Light Bulb Sizes →📖 1988 Cadillac Eldorado Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Frequently asked questions
What type of oil does a 1988 Cadillac Eldorado take?
The 1988 Cadillac Eldorado takes 5W-30 motor oil (SAE 5W-30 (Below -20Deg.F to 60Deg.F), 10W-30 (Preferred) (0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), 30 (40Deg.F to over 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1988 Cadillac Eldorado?
The 1988 Cadillac Eldorado oil capacity is 5.5 quarts with a filter change, or 5.0 quarts without changing the filter.
How often should I change the oil in my 1988 Cadillac Eldorado?
Most 1988 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 1988 Cadillac Eldorado?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1988 Cadillac Eldorado. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.