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      01-05-2013, 04:53 AM   #34
Robin330i
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Drives: E90 330i M Sport
Join Date: Jul 2012
Location: Cheshire

Posts: 362
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Manufacturers spend millions and millions on engine durability dyno testing alone and the test we go through can never be simulated in a car - even on a race track all day long you will not replicate what we do on the testbed. The tests will include oil changes at the same frequency as what is reccomended in the hand book - if a problem is found on engine components due to the oil quality then it will be rectified with either a new grade of oil or shorter service intervals which will then be listed in the handbook.

There is no harm in having more regular oil changes however I can confirm it isn't required unless you suspect that you have a leaking injector ( fuel in the oil will heavily influence the oil viscosity) or if you do a large number of cold starts (-10'c) as fuel dilution in the oil will be greater.
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