Quote:
Originally Posted by DR-JEKL
Since you're in canberra the 0W40 would be your best choice (cold temps!)
With the 0W40 you get the best of both worlds, but of course its slightly more expensive.
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I use the 0w40 when I top up, but I checked with the local dealer and they still use 5w30...
I had a long discussion with the Castrol helpline person (who actually did sound knowledgeable!), and he did say something about 30 being slightly better than 40 on an older engine. Or was it the 5w vs 0w, I can't remember.
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2019 X3 M40i, Sophisto grey, H/K, pano
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