When news broke that OXE Marine and GM Marine  had signed a development agreement to use Duramax engines  in a new generation of diesel outboards, most people saw it as a marine story. For 3.0 Duramax owners, it is something else entirely: It’s a strong signal that GM sees the LZ0 3.0L Duramax inline-six  as a long-term platform, not a short-lived experiment. In this article, we’ll break down what the agreement actually says, why it matters for truck and SUV owners, and how a