1987 Isuzu I-Mark Oil Type & Capacity: 5W-20 (3.4 quarts)
The 1987 Isuzu I-Mark takes 5W-20 motor oil — 3.4 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-20 — 3.4 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, 2D Hatchback, Automatic — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| Base, 2D Hatchback, Standard — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| Base, 4D Sedan, Automatic — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| Base, 4D Sedan, Standard — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| RS, 2D Hatchback, Automatic — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| RS, 2D Hatchback, Standard — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| RS, 4D Sedan, Automatic — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| RS, 4D Sedan, Standard — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| S, 2D Hatchback, Automatic — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| S, 2D Hatchback, Standard — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| S, 4D Sedan, Automatic — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
| S, 4D Sedan, Standard — 1.5L Eng | SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F) | — | 3.00 QTS. | — |
More factory specs & repair guides for your I-Mark
🛞 1987 Isuzu I-Mark Tire Size & Pressure →🌧️ 1987 Isuzu I-Mark Wiper Blade Sizes →💡 1987 Isuzu I-Mark Light Bulb Sizes →📖 1987 Isuzu I-Mark Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
6.8 quarts (6.43 L) — 50/50 mixture of good quality ethylene-glycol antifreeze & water.
Frequently asked questions
What type of oil does a 1987 Isuzu I-Mark take?
The 1987 Isuzu I-Mark takes 5W-20 motor oil (SAE 5W-20 (Below 20Deg.F), 5W-30 (Below 60Deg.F), 10W-30 (Above 0Deg.F), 20W-20/40 (Above 20Deg.F), 30 (Above 40Deg.F)), per the factory service manual.
What is the oil capacity of a 1987 Isuzu I-Mark?
The 1987 Isuzu I-Mark oil capacity is 3.4 quarts with a filter change, or 3.0 quarts without changing the filter.
How often should I change the oil in my 1987 Isuzu I-Mark?
Most 1987 Isuzu I-Mark 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 — Isuzu recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1987 Isuzu I-Mark?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1987 Isuzu I-Mark. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.