This is mostly for my own curiosity and knowledge and I haven't ran into any issues personally. The 0w40 Euro oils we use for BMW,Mercedes, VW engines have and meet their respective factory certification which is fine, but I was curious why the API certification was only SN.
From my experience, and this could just be a coincidence but all gas turbo charged German engines seem to use 0w40. All these newer motors I have in mind are turbo charged direct injected motors. SN+ from my understanding was to address LSPI. These engines seem to be good candidates to suffer from LSPI, yet no Euro oil that I've seen has the SN+ rating. As a matter of fact SN+ seems to only come in 30 and 20wt oils.
Is there any explanation to what I've noticed?
From my experience, and this could just be a coincidence but all gas turbo charged German engines seem to use 0w40. All these newer motors I have in mind are turbo charged direct injected motors. SN+ from my understanding was to address LSPI. These engines seem to be good candidates to suffer from LSPI, yet no Euro oil that I've seen has the SN+ rating. As a matter of fact SN+ seems to only come in 30 and 20wt oils.
Is there any explanation to what I've noticed?
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