Because American companies <i>don&#x27;t</i> make diesel cars.<p>Aside from trucks, that is.<p>I tend to keep up on cars, and I can&#x27;t name any American-brand, small diesel off the top of my head from the last 30+ years, aside from last year&#x27;s Chevy Cruze.<p>Edit&#x2F;clarification: I&#x27;m speaking strictly of the American market. If American companies make small diesel cars for international markets, it&#x27;s not at all relevant to discussing small diesel cars in the US.