A.P. 129 RAF Flying Training Manual, Part I - Landplanes

[Crumpp]

general notes are not aircraft specific?

It specifically says in engine limitations, Paragraph 3(ii):

"These figure provide a general guideline to the reasonable use of the engine. In combat and emergency other considerations may justify the pilot in disregarding these limitations"

You cannot look at a combat report that used an overboost condition as proof of 100 Octane fuel use.