1989 Isuzu Trooper Oil Type & Capacity
The 1989 Isuzu Trooper oil type depends on the engine: the RS, 2D Utility, 2.6 E, Automatic takes 5W-20 (4.2 quarts qt with filter); the RS, 2D Utility, 2.6 E, Standard takes 5W-20 (4.2 quarts qt with filter); the RS, 2D Utility, 2.8 R takes 5W-20 (4.5 quarts qt with filter); the RS, 4D Utility, 2.6 E, Automatic takes 5W-20 (4.2 quarts qt with filter); the RS, 4D Utility, 2.6 E, Standard takes 5W-20 (4.2 quarts qt with filter); the RS, 4D Utility, 2.8 R takes 5W-20 (4.5 quarts qt with filter); the S, 2D Utility, 2.6 E, Automatic takes 5W-20 (4.2 quarts qt with filter); the S, 2D Utility, 2.6 E, Standard takes 5W-20 (4.2 quarts qt with filter); the S, 2D Utility, 2.8 R takes 5W-20 (4.5 quarts qt with filter); the S, 4D Utility, 2.6 E, Automatic takes 5W-20 (4.2 quarts qt with filter); the S, 4D Utility, 2.6 E, Standard takes 5W-20 (4.2 quarts qt with filter); the S, 4D Utility, 2.8 R takes 5W-20 (4.5 quarts qt with filter); the XS, 2.6 E, Automatic takes 5W-20 (4.2 quarts qt with filter); the XS, 2.6 E, Standard takes 5W-20 (4.2 quarts qt with filter); the XS, 2.8 R takes 5W-20 (4.5 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- RS, 2D Utility, 2.6 E, Automatic: 5W-20, 4.2 quarts with filter
- RS, 2D Utility, 2.6 E, Standard: 5W-20, 4.2 quarts with filter
- RS, 2D Utility, 2.8 R: 5W-20, 4.5 quarts with filter
- RS, 4D Utility, 2.6 E, Automatic: 5W-20, 4.2 quarts with filter
- RS, 4D Utility, 2.6 E, Standard: 5W-20, 4.2 quarts with filter
- RS, 4D Utility, 2.8 R: 5W-20, 4.5 quarts with filter
- S, 2D Utility, 2.6 E, Automatic: 5W-20, 4.2 quarts with filter
- S, 2D Utility, 2.6 E, Standard: 5W-20, 4.2 quarts with filter
- S, 2D Utility, 2.8 R: 5W-20, 4.5 quarts with filter
- S, 4D Utility, 2.6 E, Automatic: 5W-20, 4.2 quarts with filter
- S, 4D Utility, 2.6 E, Standard: 5W-20, 4.2 quarts with filter
- S, 4D Utility, 2.8 R: 5W-20, 4.5 quarts with filter
- XS, 2.6 E, Automatic: 5W-20, 4.2 quarts with filter
- XS, 2.6 E, Standard: 5W-20, 4.2 quarts with filter
- XS, 2.8 R: 5W-20, 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| RS, 2D Utility, 2.6 E, Automatic — 2.6L 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) | — | 3.80 QTS. | — |
| RS, 2D Utility, 2.6 E, Standard — 2.6L 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) | — | 3.80 QTS. | — |
| RS, 2D Utility, 2.8 R — 2.8L 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) | — | 4.00 QTS. | — |
| RS, 4D Utility, 2.6 E, Automatic — 2.6L 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) | — | 3.80 QTS. | — |
| RS, 4D Utility, 2.6 E, Standard — 2.6L 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) | — | 3.80 QTS. | — |
| RS, 4D Utility, 2.8 R — 2.8L 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) | — | 4.00 QTS. | — |
| S, 2D Utility, 2.6 E, Automatic — 2.6L 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) | — | 3.80 QTS. | — |
| S, 2D Utility, 2.6 E, Standard — 2.6L 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) | — | 3.80 QTS. | — |
| S, 2D Utility, 2.8 R — 2.8L 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) | — | 4.00 QTS. | — |
| S, 4D Utility, 2.6 E, Automatic — 2.6L 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) | — | 3.80 QTS. | — |
| S, 4D Utility, 2.6 E, Standard — 2.6L 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) | — | 3.80 QTS. | — |
| S, 4D Utility, 2.8 R — 2.8L 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) | — | 4.00 QTS. | — |
| XS, 2.6 E, Automatic — 2.6L 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) | — | 3.80 QTS. | — |
| XS, 2.6 E, Standard — 2.6L 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) | — | 3.80 QTS. | — |
| XS, 2.8 R — 2.8L 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) | — | 4.00 QTS. | — |
More factory specs & repair guides for your Trooper
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Coolant capacity
8.44 quarts (7.98 L) — 50/50 mixture of good quality ethylene-glycol antifreeze & water.
Frequently asked questions
What type of oil does a 1989 Isuzu Trooper take?
It depends on the engine: RS, 2D Utility, 2.6 E, Automatic uses 5W-20; RS, 2D Utility, 2.6 E, Standard uses 5W-20; RS, 2D Utility, 2.8 R uses 5W-20; RS, 4D Utility, 2.6 E, Automatic uses 5W-20; RS, 4D Utility, 2.6 E, Standard uses 5W-20; RS, 4D Utility, 2.8 R uses 5W-20; S, 2D Utility, 2.6 E, Automatic uses 5W-20; S, 2D Utility, 2.6 E, Standard uses 5W-20; S, 2D Utility, 2.8 R uses 5W-20; S, 4D Utility, 2.6 E, Automatic uses 5W-20; S, 4D Utility, 2.6 E, Standard uses 5W-20; S, 4D Utility, 2.8 R uses 5W-20; XS, 2.6 E, Automatic uses 5W-20; XS, 2.6 E, Standard uses 5W-20; XS, 2.8 R uses 5W-20.
What is the oil capacity of a 1989 Isuzu Trooper?
Oil capacity depends on the engine: RS, 2D Utility, 2.6 E, Automatic holds 4.2 quarts with filter; RS, 2D Utility, 2.6 E, Standard holds 4.2 quarts with filter; RS, 2D Utility, 2.8 R holds 4.5 quarts with filter; RS, 4D Utility, 2.6 E, Automatic holds 4.2 quarts with filter; RS, 4D Utility, 2.6 E, Standard holds 4.2 quarts with filter; RS, 4D Utility, 2.8 R holds 4.5 quarts with filter; S, 2D Utility, 2.6 E, Automatic holds 4.2 quarts with filter; S, 2D Utility, 2.6 E, Standard holds 4.2 quarts with filter; S, 2D Utility, 2.8 R holds 4.5 quarts with filter; S, 4D Utility, 2.6 E, Automatic holds 4.2 quarts with filter; S, 4D Utility, 2.6 E, Standard holds 4.2 quarts with filter; S, 4D Utility, 2.8 R holds 4.5 quarts with filter; XS, 2.6 E, Automatic holds 4.2 quarts with filter; XS, 2.6 E, Standard holds 4.2 quarts with filter; XS, 2.8 R holds 4.5 quarts with filter.
How often should I change the oil in my 1989 Isuzu Trooper?
Most 1989 Isuzu Trooper 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 1989 Isuzu Trooper?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1989 Isuzu Trooper. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.