I have a 03 Dodge 1500 (4.7 with a 5 speed auto) that gets close to 20 mpg on the road bobtail. All of my trailers are large -- compared to an ultalight: (a 22’ travel trailer, a 6 by 12 box trailer, and a 6 by 15 flat bed).
The Dodge pulls them all easily, but mileage drops according to the size of the trailer and the load. The Dodge would pull the ultralight very easily, but I am hoping to use my Chevy Cavalier instead.
That little 4 banger gets 32 on the road. What will it do pulling an ultralight. I don’t know yet.
But, I am getting close to a real life experiment! In a few weeks I should be able to do some real life driving to see what goes.
I am pretty sure that the bitty car will pull the ultralight fine, but who knows what the mileage will be.
If it comes out at 19, I'll be unhappy!
dave