Test drove a gas Pro4x last night, same truck but different beast. First, it takes a little more pedal to get going than my 04 Titan, but it will get up and go. Seems to be more responsive, not as much " lag" if that is the right word, as the diesel. The ride was the same fantastic, quiet ride that I experienced in the diesel. The seven speed transmission shifted very smoothly both up and down, at times, it almost seemed like a CVT. Fuel mileage was skewed due to allowing truck to idle for some time, however I did manage 22 mpg at 65 mph for a short while, much better than my 04. Unfortunately the one my dealer received had the added "convenience " package that I am not interested in, I only want the Utility and Audio package, which by the way the Rockford system is awesome compared to the stereos in the lesser trims, hopefully I can get a dealer swap and be in my gasser this weekend.