Let us introduce the Tiger Champ. One of the truck models gets 37 mpg with a three-cylinder diesel
engine from Caterpillar. The design is Chinese, by Chongqing Changan Automobile Co., but it's assembled in Oklahoma by Tiger Truck LLC and available at 70 dealerships
nationwide. The only problem is that the truck is really, really slow and it does not meet federal safety standards, so it must be off-highways in most states, although it can run everywhere in the Sooner State.
Two options are available: a small Tiger Star with an gas I-4 engine (available with E85 compatibility) able to carry 1,700 pounds. But the Champ outdoes the Star with a diesel I-4 which is rated at 37mpg, and can carry up to 3,780 pounds of weight (32 mpg for the gas version). Tiger can produce about 35 trucks a day at its plant altough currently they are only turning out about 5 trucks per day.
[Source: Automotive News