PK I understan your points,but you seemed didn't get mines.

If we talking about MPG over the years manufacturers have manage to improve fuel economy and powertrain. Do we agree on that ?

Yes,diesel is the best option here but how many SUV's comes with that options as we speak ?

Isuzu just keep building modest engines,if you wanna haul an small RV i bet you wouldn't want a SUV with only 163hp when you can definately get more then that probably for the same amount of cash.