The hard part is the 200 mpg (you'd need only 5 gallons to go 1000 mi.).
The specs for the
Aptera at 55 mph with a parallel hybrid diesel are 230 mpg. At 65 mph, you'd need about 1/3 more hp and would probably get less than 200 mpg. It's not mass-produced yet but you can put a deposit on one.