About 5 quarts (4.7 liters) of engine oil, with a new filter, using Dexos1-approved 5W-30 motor oil.
Understanding the 2016 Buick 3.6L oil capacity
The 2016 Buick models that used the 3.6-liter V6, such as the Enclave and LaCrosse, are generally listed with an oil capacity of 5.0 quarts (4.7 liters) when performing a full oil change with a new filter. This capacity is the standard figure in GM service information for these engines. Variations between specific engine variants and model applications are usually small, but always confirm the exact specification for your VIN in the owner's manual or service literature.
Oil type and climate considerations
GM recommends Dexos1 Gen 2-approved engine oil for the 3.6L V6 in these Buicks, with a typical grade of 5W-30. In very hot or cold climates, some technicians may advise a different Dexos1-approved viscosity within the same specification, but 5W-30 remains the common baseline for 2016 models. The capacity figure refers to a complete change including the oil filter; if you skip replacing the filter, the total oil drained will be less, and you should add oil until the dipstick indicates the full level after the change.
Practical tips for performing an oil change
To ensure accuracy and a clean finish, follow these general steps: drain the old oil completely, replace the oil filter, and add fresh oil gradually while monitoring the dipstick. Start the engine briefly to circulate the new oil, turn it off, then recheck the level on level ground with the engine at operating temperature. Adjust as needed to reach the full mark on the dipstick. Always dispose of used oil and filters according to local regulations and consult the vehicle’s manual for any model-specific instructions.
Summary
The 2016 Buick 3.6L V6 engine typically takes about 5 quarts (4.7 liters) of engine oil with a filter, using Dexos1 5W-30 oil. Exact capacity can vary slightly by model and variant, so confirm with the owner's manual or service documentation for your vehicle's VIN and follow the dipstick guidance to reach the proper level after an oil change.