Long ago we tried an inflated boat tail on the T-100.
You can see that we had a rooftop cargo carrier in the bed,along with a half-tonneau,then the tail.
On a 585-mile test we got over 30-mpg.Nothing else was done to the truck.
An 'improved' version would be automatic and you wouldn't have to deal with the extra length in town.Very light weight as well
With a half-tonneau,you'd be at low 30s mpg guaranteed.
