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I have done the tour - there is definitely oil in the engine - they said they don't fire the engine with fuel for a few reasons, one is the cost - the save a zillion dollars if they don't have to burn a few ounces of fuel in a million less engines, no emissions issues to deal with and no danger of having to have fuel etc in the area.
M engines are still wet fired though.
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2008 E93 335i
2014 X3 35i |