1990 Mercury Topaz Oil Type & Capacity: 5W-30 (5.0 quarts)
The 1990 Mercury Topaz 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 |
|---|---|---|---|---|
| GS, 2D Sedan, Automatic | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| GS, 2D Sedan, Standard | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| GS, 4D Sedan, 2.3 S | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| GS, 4D Sedan, 2.3 X, Automatic | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| GS, 4D Sedan, 2.3 X, Standard | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| LS, 2.3 S | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| LS, 2.3 X, Automatic | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| LS, 2.3 X, Standard | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| LTS, 4WD | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| LTS, FWD, Automatic | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| LTS, FWD, Standard | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| XR5, Automatic | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
| XR5, Standard | SAE 5W-30 Super Premium Motor Oil | 5.00 QTS. | 4.00 QTS. | — |
More factory specs & repair guides for your Topaz
🛞 1990 Mercury Topaz Tire Size & Pressure →🌧️ 1990 Mercury Topaz Wiper Blade Sizes →💡 1990 Mercury Topaz Light Bulb Sizes →📖 1990 Mercury Topaz Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
7.8 quarts (7.38 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water. Add .5 qt. to Coolant Recovery Reservoir.
Frequently asked questions
What type of oil does a 1990 Mercury Topaz take?
The 1990 Mercury Topaz takes 5W-30 motor oil (SAE 5W-30 Super Premium Motor Oil), per the factory service manual.
What is the oil capacity of a 1990 Mercury Topaz?
The 1990 Mercury Topaz oil capacity is 5.0 quarts with a filter change, or 4.0 quarts without changing the filter.
How often should I change the oil in my 1990 Mercury Topaz?
Most 1990 Mercury Topaz 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 — Mercury recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1990 Mercury Topaz?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1990 Mercury Topaz. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.