What is the oil capacity on a 2007 Mini Cooper, non-S, with filter change? Is 5W30 preferred over 5W50? Why?
For your 2007 MINI Cooper non-S, I would recommend you use whatever viscosity is specified on the decal on the valve cover of your engine. MINI specifies API SH specification or higher on the synthetic motor oil with a volume of 4.2 liters or 4.4 US quarts when replacing the oil filter. On our Cooper S, the label states 5W/30. MINI approved oils belong to the 5W-40 and
They also caution not to overfill.
I strongly recommend you stay with the recommended viscosity due to various components in the 2007 engine affected by hydraulic pressure. This includes the VANOS variable valve technology, on-demand water pump, and on-demand oil pump.