Quote:
Originally Posted by WolfGTI
Not sure why you think 5W40 is the wrong oil - quoting directly from the owners manual.
Viscosity grades for engine oils
When selecting an engine oil, ensure that
the engine oil belongs to one of the viscosity
grades SAE 0W-40, SAE 0W-30, SAE 5W-40,
and SAE 5W-30 or malfunctions or engine
damage may occur.◀
The engine oil quality is critical for the life of
the engine.
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With the M240i, that is the statement for adding up to 1 litre/quart when the correct 0w20/0w30 oil is not available (BMW Longlife-01 FE and BMW Longlife-14 FE+ oil specs only allow 0w20 and 0w30 oils):