Im not going to drive WOT all the time. If you drive conservatively you have a higher miles per gallon with a FI car. It takes less energy and gas to move your car then a NA car because your pushing more air in the cylinder and getting a bigger explosive force vs pushing more gas with a NA car to get the same force.

Edit: And im planning on getting at minimum 400whp DD and 450 at the track with racing gas. Im not sure which turbo im getting yet. I have a small one that hasnt been installed yet, after rebuilding my engine im not going to waste my time with small boost. Any turbos that cant flow 45lb/min is too small. Im looking at the GT3071R (450whp) or the GT30R (500whp). I think im going to go with the GT30741R because it spools 1,000 rpms sooner then the GT30R.