2003 Isuzu Ascender Oil Type & Capacity
The 2003 Isuzu Ascender takes 5W-30 motor oil — 7.0 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 7.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 4.2 S, 4WD | API - SAE 5W-30 | 7.00 QTS. | — | — |
| 4.2 S, RWD | API - SAE 5W-30 | 7.00 QTS. | — | — |
| 5.3 P, 4WD | API - SAE 5W-30 | 7.00 QTS. | — | — |
| 5.3 P, RWD | API - SAE 5W-30 | 7.00 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Ascender
2003 Isuzu Ascender factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
N/A (N/A) — 50/50 mixture of DEX-COOL and drinkable water
Frequently asked questions
What type of oil does a 2003 Isuzu Ascender take?
The 2003 Isuzu Ascender takes 5W-30 motor oil (API - SAE 5W-30), per the factory service manual.
How much oil does a 2003 Isuzu Ascender take?
The 2003 Isuzu Ascender holds 7.0 quarts with a filter change.
Can I use synthetic oil in my 2003 Isuzu Ascender?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2003 Isuzu Ascender. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.