SEAT presents the Leon Ecomotive Prototype, a car said to be capable of travelling a full 10,000 miles (16,093 km) without refuelling. Making this feat possible is a 545 litre (120 UK gallons/ 144 US gallons) diesel tank accommodated within the car.

Gone are the rear seats, and instead this massive liquid-holder has been fitted safely into that space while storage space was engineered to sit on top of it. The engine is a 1.6-litre TDI common rail powerplant with start-stop technology.

Because the car comes with a 12-month/10,000-mile service interval, buyers would not need to refuel it themselves. In any case, it cannot be filled up at the nearest filling station thanks to a special nozzle in the boot. Therefore only the dealer can put diesel in on service day. Drivers with higher mileage needs would simply bring it in as soon as it hits 10,000 miles.

"Clearly, you'd be a fool not to see the benefits of this new Leon Ecomotive," said head of SEAT UK Press & PR, Mike Orford. "Travelling 10,000 miles between fill-ups removes a significant amount of forecourt queuing and waiting time for Leon drivers, meaning they'll have more time to spend enjoying their car. We expect the first drivers will be tickled pink when the car goes on sale here."

Note:  We know it's not April 1st anymore, but we couldn't resist.


Gallery: Seat Leon Ecomotive goes 10,000 on Single Tank

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