The 2018 Impala with the 3.6-liter V6 engine takes about 6 quarts (5.7 liters) of engine oil for a full change, including the oil filter.
Oil capacity details
Understanding the official capacity helps you plan a proper oil change and avoid overfilling or underfilling the engine. For this model, the standard specification is 6 quarts of oil when replacing the filter.
- Oil capacity (with a new filter): 6 quarts (5.7 liters).
Note that variations can occur if a different oil filter is used or if you perform an unusual drain procedure. Always confirm the exact quantity with the owner's manual or your dealer if you’re using aftermarket parts.
Other maintenance considerations
Recommended oil type and viscosity
Use a dexos1 Gen 2 certified engine oil, typically SAE 5W-30, with synthetic or synthetic-blend formulations preferred for optimal protection and performance in a modern 3.6L V6.
Oil change intervals and monitoring
GM vehicles with an oil life monitoring system generally target longer intervals when driving under normal conditions (often around 7,500 miles with synthetic oil), but more frequent changes are advised for severe conditions such as frequent short trips, extreme temperatures, heavy towing, or dusty/non-urban driving. Always follow the oil life monitor and the owner's manual for the exact schedule.
Summary
For the 2018 Impala’s 3.6L V6, plan to add 6 quarts (5.7 liters) of engine oil when doing a full change with a new filter. Use dexos1 Gen 2 5W-30 oil and rely on the vehicle’s oil life monitor to guide changes. When in doubt, consult the owner's manual or a Chevrolet service professional for confirmation based on your specific filter and service conditions.