1991 Isuzu Trooper Oil Type & Capacity
The 1991 Isuzu Trooper oil type depends on the engine: the LS, 2D Utility, Automatic takes 5W-20 (5.2 quarts with filter); the LS, 2D Utility, Standard takes 5W-20 (5.2 quarts with filter); the LS, 4D Utility, Automatic takes 5W-20 (4.5 quarts with filter); the LS, 4D Utility, Standard takes 5W-20 (4.5 quarts with filter); the S, 2.6 E, Automatic takes 5W-20 (5.2 quarts with filter); the S, 2.6 E, Standard takes 5W-20 (5.2 quarts with filter); the S, 2.8 R, Automatic takes 5W-20 (4.5 quarts with filter); the S, 2.8 R, Standard takes 5W-20 (4.5 quarts with filter); the SE, 2.6 E, Automatic takes 5W-20 (5.2 quarts with filter); the SE, 2.6 E, Standard takes 5W-20 (5.2 quarts with filter); the SE, 2.8 R, Automatic takes 5W-20 (4.5 quarts with filter); the SE, 2.8 R, Standard takes 5W-20 (4.5 quarts with filter); the XS, 2.6 E, Automatic takes 5W-20 (5.2 quarts with filter); the XS, 2.6 E, Standard takes 5W-20 (5.2 quarts with filter); the XS, 2.8 R, Automatic takes 5W-20 (4.5 quarts with filter); the XS, 2.8 R, Standard takes 5W-20 (4.5 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- LS, 2D Utility, Automatic: 5W-20, 5.2 quarts with filter
- LS, 2D Utility, Standard: 5W-20, 5.2 quarts with filter
- LS, 4D Utility, Automatic: 5W-20, 4.5 quarts with filter
- LS, 4D Utility, Standard: 5W-20, 4.5 quarts with filter
- S, 2.6 E, Automatic: 5W-20, 5.2 quarts with filter
- S, 2.6 E, Standard: 5W-20, 5.2 quarts with filter
- S, 2.8 R, Automatic: 5W-20, 4.5 quarts with filter
- S, 2.8 R, Standard: 5W-20, 4.5 quarts with filter
- SE, 2.6 E, Automatic: 5W-20, 5.2 quarts with filter
- SE, 2.6 E, Standard: 5W-20, 5.2 quarts with filter
- SE, 2.8 R, Automatic: 5W-20, 4.5 quarts with filter
- SE, 2.8 R, Standard: 5W-20, 4.5 quarts with filter
- XS, 2.6 E, Automatic: 5W-20, 5.2 quarts with filter
- XS, 2.6 E, Standard: 5W-20, 5.2 quarts with filter
- XS, 2.8 R, Automatic: 5W-20, 4.5 quarts with filter
- XS, 2.8 R, Standard: 5W-20, 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| LS, 2D Utility, Automatic — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| LS, 2D Utility, Standard — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| LS, 4D Utility, Automatic — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| LS, 4D Utility, Standard — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| S, 2.6 E, Automatic — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| S, 2.6 E, Standard — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| S, 2.8 R, Automatic — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| S, 2.8 R, Standard — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| SE, 2.6 E, Automatic — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| SE, 2.6 E, Standard — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| SE, 2.8 R, Automatic — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| SE, 2.8 R, Standard — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| XS, 2.6 E, Automatic — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| XS, 2.6 E, Standard — 2.6L Eng | API - 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) | 5.20 QTS. | 4.80 QTS. | — |
| XS, 2.8 R, Automatic — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
| XS, 2.8 R, Standard — 2.8L Eng | API - 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) | 4.50 QTS. | 4.00 QTS. | — |
Buy the right oil
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More specs & repair guides for your Trooper
1991 Isuzu Trooper factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
8.5 quarts (8.04 L) — 50/50 mixture of Ethylene Glycol Antifreeze and water
Frequently asked questions
What type of oil does a 1991 Isuzu Trooper take?
It depends on the engine: LS, 2D Utility, Automatic uses 5W-20; LS, 2D Utility, Standard uses 5W-20; LS, 4D Utility, Automatic uses 5W-20; LS, 4D Utility, Standard uses 5W-20; S, 2.6 E, Automatic uses 5W-20; S, 2.6 E, Standard uses 5W-20; S, 2.8 R, Automatic uses 5W-20; S, 2.8 R, Standard uses 5W-20; SE, 2.6 E, Automatic uses 5W-20; SE, 2.6 E, Standard uses 5W-20; SE, 2.8 R, Automatic uses 5W-20; SE, 2.8 R, Standard uses 5W-20; XS, 2.6 E, Automatic uses 5W-20; XS, 2.6 E, Standard uses 5W-20; XS, 2.8 R, Automatic uses 5W-20; XS, 2.8 R, Standard uses 5W-20.
How much oil does a 1991 Isuzu Trooper take?
Capacity depends on the engine: LS, 2D Utility, Automatic holds 5.2 quarts with filter; LS, 2D Utility, Standard holds 5.2 quarts with filter; LS, 4D Utility, Automatic holds 4.5 quarts with filter; LS, 4D Utility, Standard holds 4.5 quarts with filter; S, 2.6 E, Automatic holds 5.2 quarts with filter; S, 2.6 E, Standard holds 5.2 quarts with filter; S, 2.8 R, Automatic holds 4.5 quarts with filter; S, 2.8 R, Standard holds 4.5 quarts with filter; SE, 2.6 E, Automatic holds 5.2 quarts with filter; SE, 2.6 E, Standard holds 5.2 quarts with filter; SE, 2.8 R, Automatic holds 4.5 quarts with filter; SE, 2.8 R, Standard holds 4.5 quarts with filter; XS, 2.6 E, Automatic holds 5.2 quarts with filter; XS, 2.6 E, Standard holds 5.2 quarts with filter; XS, 2.8 R, Automatic holds 4.5 quarts with filter; XS, 2.8 R, Standard holds 4.5 quarts with filter.
Can I use synthetic oil in my 1991 Isuzu Trooper?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Isuzu Trooper. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.