Good review. I am hoping this:

As sooty as a chimney sweep? Not a chance, benzene-breath. The Bluetec's exhaust has to pass through a phalanx of devices: an oxidation catalytic converter snugged up against the turbo's exit, the NOX storage catalyst, a ceramic particulate filter, and a third converter near the tailpipe. The particulate filter is especially interesting, as it periodically undergoes what's analogous to a self-cleaning oven cycle as it becomes clogged with soot. On cue from the engine-management computer, extra fuel is injected, dumping more unburned hydrocarbons into the first converter to increase heat; also, the timing of injections is retarded. Both result in the exhaust temperature briefly hitting 650 degrees Celsius (more than 1200 degrees Fahrenheit), enough to burn off the soot and clean the filter.

Will shut up the Lexus hybrid fanboys in their crusade to discredit diesels. Again, FANBOYS, not fans (like Bruce).