2019 BMW 320i and 330i (B48 2.0L engine): 5.2 quarts (4.9 liters)
2019 BMW M340i (B58 3.0L engine): 7.0 quarts (6.6 liters)
You can find the exact oil capacity for your specific BMW 3 series model by checking the owner's manual or the specifications provided by your dealership. It's important to use the correct amount of oil as specified by the manufacturer to ensure proper engine operation and longevity.