[Seadog]

Those years of research to make 100 octane commercially available paid off magnificently in historical significance during World War II. While aware of the superior quality of 100 octane as aviation fuel, Germany had neither indigenous petroleum Production nor a highly developed refining industry, and the possibilities of domestic production or storage on a large scale were limited. Indeed, when Hitler marched into Poland in 1939, the hydrogenation plant of Jersey's affiliate, Standard Oil of Louisiana, in Baton Rouge, was alone turning out more 100 octane gasoline than all the combined refineries and synthetic oil plank in Germany. Throughout the war, the Luftwaffe was forced to rely on aromatic types of synthetic fuels. The combat effectiveness of 100 octane was strikingly demonstrated initially in the Battle of Britain where Royal Air Force Spitfires and Hurricanes outfought the enemy. Germany lost 2,152 planes to Britain's 620.

The petroleum industry exerted a tremendous effort to keep the Allies supplied with 100 octane gasoline during the war years...
MJ Rathbone (President of Standard oil Company)Fuel for Flight, Flying Magazine Oct 1958, p37.

Funny how there's a complete lack of sources stating that RAF FC didn't exclusively use 100 octane fuel during the BofB...