Interesting fact: US supplied the UK 100 octane fuel during the Battle of Britain that allowed the Spitfire to match the performance of the 109.
https://flyingheritage.org/Explore/The-Collection/Germany/Focke-Wulf-Fw-190-D-13-(Dora).aspx
https://flyingheritage.org/Explore/The-Collection/Germany/Focke-Wulf-Fw-190-D-13-(Dora).aspx
