On 100 octane fuel.
http://www.ww2aircraft.net/forum/tec...bob-16305.html
http://www.ww2aircraft.net/forum/avi...2-a-20108.html
Glider put a lot of work into this and is the best I have seen on 100 octane fuel use during the BoB.
One might have to register to see the images.