1998 Isuzu Oasis Oil Type & Capacity: 5W-30 (4.5 quarts)
The 1998 Isuzu Oasis takes 5W-30 motor oil — 4.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| LS | API - SAE 5W-30 (Preferred) (Below -20 to Above 100Deg.F), 10W-30 (Above 20Deg.F) | 4.50 QTS. | 4.20 QTS. | — |
| S | API - SAE 5W-30 (Preferred) (Below -20 to Above 100Deg.F), 10W-30 (Above 20Deg.F) | 4.50 QTS. | 4.20 QTS. | — |
More factory specs & repair guides for your Oasis
🛞 1998 Isuzu Oasis Tire Size & Pressure →🌧️ 1998 Isuzu Oasis Wiper Blade Sizes →💡 1998 Isuzu Oasis Light Bulb Sizes →📖 1998 Isuzu Oasis Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
6.64 quarts (6.28 L) — 50/50 mixture of Ethylene Glycol Antifreeze and water
Frequently asked questions
What type of oil does a 1998 Isuzu Oasis take?
The 1998 Isuzu Oasis takes 5W-30 motor oil (API - SAE 5W-30 (Preferred) (Below -20 to Above 100Deg.F), 10W-30 (Above 20Deg.F)), per the factory service manual.
What is the oil capacity of a 1998 Isuzu Oasis?
The 1998 Isuzu Oasis oil capacity is 4.5 quarts with a filter change, or 4.2 quarts without changing the filter.
How often should I change the oil in my 1998 Isuzu Oasis?
Most 1998 Isuzu Oasis 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 1998 Isuzu Oasis?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1998 Isuzu Oasis. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.