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I asked pretty much same question as OP. I got an in-depth about what blow by is.... (I know what blow by is, my husband's been a mechanic for ever). What I didn't get was why blow by is an issue on these engines (LLT & LFX). I understand the concept, I don't understand the need or issue - UNLESS this causes more problems later down the road than anything else I've driven over the last 30 years.
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