Good Wear Protection and Friction Reduction
WARNING: This page does not describe the selected car, but rather 180 other vehicles, including the 2014 BMW i8, 2014 BMW i3, 2014 BMW Z4, 2014 BMW X6 M, and 2014 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
Frictional losses will lead to a reduction of engine power and efficiency. An appropriate engine oil will minimize frictional losses. Excessive wear will lead to a reduction in service life (e. g. wear of bearings, piston rings, cam lobes) or to mechanical failure.