2003 Pontiac Grand Prix Oil Type & Capacity: 5W-30 (4.5 quarts)
The 2003 Pontiac Grand Prix 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 |
|---|---|---|---|---|
| GT | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | If the temperature range is 0Deg.F (-18Deg.C) or above SAE 10W-30 oil which has the API Starburst symbol is acceptable if SAE 5W 30 oils is not available. Areas where the temperature falls below -20°F (-29°C), it is recommended either an SAE 5W-30 synthetic oil or and SAE 0W-30 oil. Both will provide easier cold starting and better protection for the engine at extremely low temperatures. Do not use other viscosity grade oils, such as SAE 10W-40 or SAE 20W-50 under any conditions. |
| GTP | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | If the temperature range is 0Deg.F (-18Deg.C) or above SAE 10W-30 oil which has the API Starburst symbol is acceptable if SAE 5W 30 oils is not available. Areas where the temperature falls below -20°F (-29°C), it is recommended either an SAE 5W-30 synthetic oil or and SAE 0W-30 oil. Both will provide easier cold starting and better protection for the engine at extremely low temperatures. Do not use other viscosity grade oils, such as SAE 10W-40 or SAE 20W-50 under any conditions. |
| SE | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | If the temperature range is 0Deg.F (-18Deg.C) or above SAE 10W-30 oil which has the API Starburst symbol is acceptable if SAE 5W 30 oils is not available. Areas where the temperature falls below -20°F (-29°C), it is recommended either an SAE 5W-30 synthetic oil or and SAE 0W-30 oil. Both will provide easier cold starting and better protection for the engine at extremely low temperatures. Do not use other viscosity grade oils, such as SAE 10W-40 or SAE 20W-50 under any conditions. |
More factory specs & repair guides for your Grand Prix
🛞 2003 Pontiac Grand Prix Tire Size & Pressure →🌧️ 2003 Pontiac Grand Prix Wiper Blade Sizes →💡 2003 Pontiac Grand Prix Light Bulb Sizes →📖 2003 Pontiac Grand Prix Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.2 quarts (10.59 L) — 50/50 mixture of DEX-COOL and clean, drinkable water. After refill, the level must be checked. Add enough engine coolant so that the fluid is within the proper operating range.
Frequently asked questions
What type of oil does a 2003 Pontiac Grand Prix take?
The 2003 Pontiac Grand Prix takes 5W-30 motor oil (API - SAE 5W-30), per the factory service manual.
What is the oil capacity of a 2003 Pontiac Grand Prix?
The 2003 Pontiac Grand Prix oil capacity is 4.5 quarts with a filter change, or 4.0 quarts without changing the filter.
How often should I change the oil in my 2003 Pontiac Grand Prix?
Most 2003 Pontiac Grand Prix 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 — Pontiac recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 2003 Pontiac Grand Prix?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2003 Pontiac Grand Prix. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.