The Withams type I screenshot is safe on brass or bronze, if it’s from the ‘classic’ range. You can buy a modern EP90 from them too, it’s a separate product.
‘Manufactured as an SAE 90 monograde gear oil to exceed the API GL4 requirements of an extreme pressure oil. Safe for use where yellow metals are present, this classic gear oil balances excellent boundary lubrication with a balanced additive pack to both protect and preserve.‘
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Alastair
Lincoln, UK.
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