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      11-08-2023, 12:27 PM   #3
4JawChuck
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Drives: 2013 128i SE
Join Date: Feb 2023
Location: Canada

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You need an LL01 oil for the additives, this protects the tin coating on the aluminum bearings, no additive (especially trace amounts of Moly) and you get accelerated west of the tin sacrificial coating.

Don’t get suckered into an LL04 oil either, that is the euro standard with very little additives to improve catalyst durability and effectiveness.

See my engine rebuild thread for what happens if you use the wrong oil.

The tin coating reacts with moly in the oil to form a chemical bond which creates a barrier for the bearing journals. The tin inserts in the pistons are there for the same reason.
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