Devils advocate here again....Ever Victorious wrote: I mean, how can you check for fuel economy problems without expending fuel?
Consult II and Consult III (the nissan factory scan tools) let you check injector pulse width, oxygen sensor function, maf function, and real time fuel consumption and economy by monitoring everything. No need for extended drives to verify fuel economy or lack of malfunction.
I run into this stuff with customers every day with a wide variety of vehicles at the dealership (and not just nissans). Consumers like to jump to conclusions and think the world is out to get them. And sadly, from working at a Nissan dealership, I've seen Versa owners to be some of the best that that.
