[Seadog]

Originally Posted by robtek

Same as you can't PROVE that there wasn't one.

Then why is there abundant evidence showing widespread use of 100 octane, and literally dozens of memoirs and histories showing the use of 100 octane, and many individual combat reports showing the use of 100 octane? Why are there no memoirs or squadron level or individual combat reports stating the use of 87 octane fuel?

I can't prove something that didn't happen, and there is NO evidence showing 87 octane fuel use during Spitfire or Hurricane combat sorties during the BofB.

There is evidence for widespread 100 octane fuel use during Spitfire or Hurricane BofB combat sorties , but no evidence of Spitfire or Hurricane combat sorties using 87 octane.