I want a diesel.
Smart is claiming that its latest diesel
(cdi) fortwo model is “the most economical
production car worldwide.”
Combined fuel consumption is 3.3 L/100
km and CO2 emissions 88 g/km. With an
annual mileage of 15,000 km (9300 mi),
drivers of the cdi would only have to refuel
15 times a year, claims the company.
It also cited the power unit as the world’s
smallest direct-injection diesel car engine.
from --- http://www.sae.org/automag/globalvehicles/04-2008/1-116-4-10.pdf