Why not bring diesel

THis is not new Idea, but why not you bring your diesel engine that you use in Europe or Asian Market into USA

second: I rented alot of time Ford Econoline 12 or 15 pax Van, can you make the last two row seats more easy to remove and more lights
(1995 Chevy Lumina Van has very light individual seats)
Because so many times I needed for carrying bag/ stuff and I mostly traveling with 5-6 in my family, and I rented 2-3 times a year
everything perfect with this van except when time to remove this
last row seats so heavy and difficult