[Glider]

This idea that a squadrons will run one fuel for a test flight in say the morning and then go through all the changes in the afternoon for an operational mission then reverse the whole thing for an engine test is simply not a goer. The effort and potential for a mistake and or conamination is just too great

When you look at the OOB some squadrons are down as operational and others as non operational. I am confident that operational squadrons would have used 100 octane and non operational squadrons 87 octane

When a squadron was rotated North they didn't become non operational, they could still be called on for missions but the chances of combat were much reduced. Some squadrons that had very heavy losses sometimes were deemed non operational but that wasn't the norm.

Bases normally held some 87 octane for aircraft passing through, station hacks, squadron communication aircraft and the like but the aircraft that could be used on ops would have been well looked after and besides at the height of the battle you couldn't take the chance of being caught on the ground changing fuel.