2003 Chevrolet Impala Oil Type & Capacity
The 2003 Chevrolet Impala oil type depends on the engine: the Base, 3.4 E takes 5W-30 (4.3 quarts qt with filter); the Base, 3.8 K takes 10W-30 (4.3 quarts qt with filter); the LS takes 10W-30 (4.3 quarts qt with filter); the Police takes 10W-30 (4.3 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- Base, 3.4 E: 5W-30, 4.3 quarts with filter
- Base, 3.8 K: 10W-30, 4.3 quarts with filter
- LS: 10W-30, 4.3 quarts with filter
- Police: 10W-30, 4.3 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, 3.4 E — 3.4L Eng | API - SAE 5W-30 | 4.30 QTS. | — | — |
| Base, 3.8 K — 3.8L Eng | API - SAE 10W-30 | 4.30 QTS. | — | — |
| LS — 3.8L Eng | API - SAE 10W-30 | 4.30 QTS. | — | — |
| Police — 3.8L Eng | API - SAE 10W-30 | 4.30 QTS. | — | — |
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More factory specs & repair guides for your Impala
🛞 2003 Chevrolet Impala Tire Size & Pressure →🌧️ 2003 Chevrolet Impala Wiper Blade Sizes →💡 2003 Chevrolet Impala Light Bulb Sizes →📖 2003 Chevrolet Impala Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.3 quarts (10.69 L) — 50/50 mixture of DEX-COOL and clean, drinkable water
Frequently asked questions
What type of oil does a 2003 Chevrolet Impala take?
It depends on the engine: Base, 3.4 E uses 5W-30; Base, 3.8 K uses 10W-30; LS uses 10W-30; Police uses 10W-30.
What is the oil capacity of a 2003 Chevrolet Impala?
Oil capacity depends on the engine: Base, 3.4 E holds 4.3 quarts with filter; Base, 3.8 K holds 4.3 quarts with filter; LS holds 4.3 quarts with filter; Police holds 4.3 quarts with filter.
How often should I change the oil in my 2003 Chevrolet Impala?
Most 2003 Chevrolet Impala 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 — Chevrolet recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 2003 Chevrolet Impala?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2003 Chevrolet Impala. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.