High mileage on a 6.6 Duramax is less about a single scary number on the odometer and more about how that number lines up with the engine’s design, maintenance history, and known weak spots. The same ...

General Motors is quietly preparing a new generation of small-block V8s, and the largest of them, a 6.6‑liter unit, is already reshaping expectations for what “base model” performance could mean for ...