Use exactly what the manufacture recommends and nothing else.
If it is a CVT transmission then yes you can use cvt gearbox oil in a mini cooper.
unleaded
Use exactly the weight that Mini recommends. http://www.ehow.com/list_7739452_list-mini-cooper-approved-oil.html
The manufacturer recommends that you use 10W-30 motor oil in your 2006 Mini Cooper. Use in extreme climates may call for a heavier oil, like 10 W40.
yes, i use royal purple.
Consult your owner's manual.
You probably have a leaking oil seal or cylinder head gasket.
Wrong oil filter. Must use OEM oil filter in Mini's. The aftermarket filters dont have the proper check valve inside.
I use about 4.25 qt (about 4 L)
Yes, you can use semi-synthetic engine oil 10W-40 in a Mini Cooper, as long as it meets the manufacturer's specifications for oil quality and standards. It's essential to check the owner's manual for any specific requirements, such as API or ACEA ratings. Additionally, ensure that the oil is suitable for the engine type, whether it's gasoline or diesel. Always confirm compatibility, especially if your Mini Cooper is under warranty.
A 2004 Mini Cooper typically requires around 4.5 quarts (approximately 4.3 liters) of oil when changing the oil and filter. It's important to use the recommended oil type, which is usually a synthetic 5W-30 oil. Always check the owner's manual for specific recommendations and guidelines.
The 2008 MINI Cooper runs on premium unleaded (required).