Squid,
Maybe the gas engine provides enough power for the needs of the buyer.
Some years ago, there was a comparison between gas and diesel owners cost. At that time you would need to drive at least 100k miles to break even on cost based on mpg and cost difference between gas and diesel.

Once the diesel makers here start to incorporate the direct injection and urea injection, then they will start to act more like gas engines. Mercedes Benz has their Bluetec series engines and VW is also now selling a common rail direct injection diesel Jetta. These new engines are acting and sounding more like gas engines. Maybe US makers are doing the same, I just haven't heard about them.

Red

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2005 Titan KC SE, Helwig, True-Track, ARE MX Canopy