The Castrol Edge 5W-40 I've been using for the last 60,000kms is working fine, although that doesn't mean much, since I have no basis for comparison. Was previously using Castrol Edge 5W-30
I'm changing the oil every 10,000kms (6,000miles), with a BMW or good OEM filter. Engine is a bit clattery at cold start (but it's a diesel!) - otherwise it runs as smooth as butter. Original turbo still working well at 260,000kms, although it is rather noisy when its really cold - and better if I warm the engine for 2-3mins before moving off.
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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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