Questions regarding the OBDlink scan tools

I have the OBDlink LX scan tool and have been playing with it a bit and trying to dial it in on my 2014 DCSB with the 4.0 motor w/SC. I'm curious from the veterans here what they are using in the settings for the fuel calculation method - whether you use the "mass air flow" or "direct fuel rate". I'm also curious as to what number to dial in for volumetric efficiency? I've been using the mass air flow setting with the VE at 85%, which I'm guessing is a bit high as my actual fuel economy is about 2 mpg worse than what the scanner says I'm getting. I just changed the VE to 75% but I haven't had a chance to test it. I haven't yet tried the "direct fuel rate" for the fuel calculation method.

 

I figured this would be pretty obscure, but I'll give it a bump for the hell of it.

 

I wish more of the tacoma owners used this Nissan has some cool features as a plugin with torque