It's not new, last year, BMW won SPA 24hrs in the touring car class with a 3 series diesel. Because it uses less fuell, they don't have to make may pitt stops.
Last week I saw something truly spectaculair.
A company named star twin here in holland has taken the engine of a VW Lupo tdi.
They made a new crankcase and gearbox for it and fitted in a.....................Motorcycle!.
By icreasing the boost pressure to 2 bar the original engine now gives 120hp.
It outperformes a ducati on the track and uses 1 liter diesel every 40 km's.(that's about 112mpg)

What do you think about that?
There are serious plans to take this bike with the aid of VW into production.
VX : CLOSEST THING TO A CONCEPT CAR!