1983 Mercury LN7 Oil Type & Capacity: 5W-30 (4.0 quarts)
The 1983 Mercury LN7 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 |
|---|---|---|---|---|
| Base, Automatic | SAE 5W-30 (Preferred) (Below -20Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| Base, Standard | SAE 5W-30 (Preferred) (Below -20Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| RS | SAE 5W-30 (Preferred) (Below -20Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
More factory specs & repair guides for your LN7
🛞 1983 Mercury LN7 Tire Size & Pressure →🌧️ 1983 Mercury LN7 Wiper Blade Sizes →💡 1983 Mercury LN7 Light Bulb Sizes →📖 1983 Mercury LN7 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
8.1 quarts (7.66 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water. Specification: ESE M97B44 A.
Frequently asked questions
What type of oil does a 1983 Mercury LN7 take?
The 1983 Mercury LN7 takes 5W-30 motor oil (SAE 5W-30 (Preferred) (Below -20Deg.F to 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1983 Mercury LN7?
The 1983 Mercury LN7 oil capacity is 4.0 quarts with a filter change.
How often should I change the oil in my 1983 Mercury LN7?
Most 1983 Mercury LN7 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 1983 Mercury LN7?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1983 Mercury LN7. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.