What is engine oil capacity of a 2006 Buick Lacrosse 3.8L V6?

The engine oil capacity of a 2006 Buick Lacrosse with a 3.8L V6 engine is approximately 4.5 quarts (or about 4.3 liters) when using a standard oil filter. If you are changing the oil filter as well, the total capacity may be slightly higher, around 5 quarts. Always refer to the owner's manual for the most accurate specifications and recommendations.