2012 NISSAN DUALIS Ti

Dualis +2 Can some one tell me how to get 8's L/100 around town. 7k5 on the clock 10.6 according to the computer 11's open road if I use the cruise. It doesn't get cained. Pricing only 2 cars we could find in the 30k - 35K with 7 seats. Captiva and Dualis. Deisel Captive great engine at 2.2 turbo. Comfort not great in comparison in Captiva. Family - option was comfort so Dualis +2 won. Thus put 2.2 Diesle from captiva in Dualis keep same pricing. Would be a very acceptabe machine.