The 2008 Chevrolet Impala generally uses 5W-30 motor oil, and the exact amount depends on the engine. Both conventional and synthetic-blend oils are acceptable.
In 2008, the Impala offered three engines: a 3.5-liter V6, a 3.9-liter V6, and the high-performance 5.3-liter V8 used in the Impala SS. The oil capacity varies by engine, so consult the owner’s manual for the precise fill and service intervals.
Engine options in the 2008 Impala
Here is a quick guide to the engines and their approximate oil capacities. Note that capacities can vary slightly by model year, trim, and oil filter choice.
- 3.5L V6 — approximately 4.7 quarts of oil (with filter); recommended oil: 5W-30 (conventional or synthetic-blend).
- 3.9L V6 — approximately 5 quarts of oil (with filter); recommended oil: 5W-30 (conventional or synthetic-blend).
- 5.3L V8 (Impala SS) — approximately 6 quarts of oil (with filter); recommended oil: 5W-30 (conventional or synthetic-blend).
Capacities are approximate and can vary based on the exact equipment and filter; confirm the exact specification in the owner's manual or a service sheet for your vehicle.
Oil viscosity and specifications
The recommended viscosity for most 2008 Impala engines is 5W-30. You may choose conventional, synthetic-blend, or full synthetic oil, as long as it meets the 5W-30 grade and the appropriate API service category for gasoline engines.
- Viscosity: 5W-30 is suitable for most climates and driving conditions.
- Oil type: conventional, synthetic-blend, or full synthetic are all acceptable options.
- Specifications: use an oil that meets or exceeds API service categories appropriate for gasoline engines (e.g., SL/SM or newer) and ensure it is suitable for your engine.
Always verify the exact specification in the owner's manual and follow GM's recommended oil-change intervals for your climate and driving style.
Summary
In short, a 2008 Impala generally uses 5W-30 motor oil, with an oil capacity that depends on the engine: about 4.7 quarts for the 3.5L, about 5 quarts for the 3.9L, and about 6 quarts for the 5.3L SS. You can use conventional, synthetic-blend, or full synthetic oil, but be sure it meets the appropriate API service rating and that you follow the vehicle’s recommended service intervals. For the exact specification, always refer to the owner's manual or a GM service bulletin for your specific vehicle.