Thanks for saying and affirming what I am trying to convey. The size of the TV/engine really doens't matter (within reason) - if all a person looks at is miles per gallon. There seems to be no
advantage to having a small TV. However, with the larger TV/ engine, you gain a lot of
performance. A small TV operates at or near it's capacity. The large TV can handle challenges (hills, wind, etc) with ease, but milage will likely drop somewhat below the 10-12mpg that seems to be what most get,
when using the extra performance.
Don't go out and buy a large engine thinking it will get better mpg while towing. The reason to buy the larger tow vehicle is because you want better performance, towing ease & safety, and longevity of the life of the engine and drivetrain.
Conversely, don't buy a small TV thinking it will save money. It will be straining it's guts out trying to get the load down the road, keep up with traffic and, road/wind challenges.
I may be burned at the stake for saying this but, the Pod is an 18' travel trailer and it "pulls" just about like any other 18' travel trailer. The lightweight advantage seems to be negated by aero forces above 50mph. As long as persons understand this and make an informed decision based on it, this is good.