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The BMW Range
3 Series
E90, E91, E92, E93
e92 335i Oil Cooling Problems...
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<blockquote data-quote="Schwepps" data-source="post: 467274" data-attributes="member: 3592"><p>I think what's more important is what is the operating temp range of the N54. If you're within that range and somewhere near the middle it should be fine. A fully-synthetic oil should always be used for a turbo like the N54 because fully-syns handle high temperatures better. A semi-syn or mineral oil rated for lower temps will oxidise at higher temps and lose its properties fast.</p><p></p><p>Finally, cool oil = sludge formation. So if I'm within the engine's range, I would rather run a bit hot than a bit cool.</p></blockquote><p></p>
[QUOTE="Schwepps, post: 467274, member: 3592"] I think what's more important is what is the operating temp range of the N54. If you're within that range and somewhere near the middle it should be fine. A fully-synthetic oil should always be used for a turbo like the N54 because fully-syns handle high temperatures better. A semi-syn or mineral oil rated for lower temps will oxidise at higher temps and lose its properties fast. Finally, cool oil = sludge formation. So if I'm within the engine's range, I would rather run a bit hot than a bit cool. [/QUOTE]
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e92 335i Oil Cooling Problems...
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