Can you use 10w40 in your 2004 mini cooper?

Using 10W-40 oil in a 2004 Mini Cooper is generally not recommended, as the manufacturer typically specifies 5W-30 or 0W-30 oil for optimal performance and efficiency. Thicker oils like 10W-40 may not flow as well in colder temperatures and could affect engine lubrication. Always consult your owner's manual or a qualified mechanic for the best oil type for your vehicle.