Dog Boats received high-octane aviation fuel

Did Dog Boats receive the 130- and 150-octane fuel used by the RAF in 1944 and 1945?

Yes. The boats obtained the high-octane fuel.

The answer directly confirms the use of high-octane fuel. That fits the powerful Packard and Griffon engines discussed for the Fairmile D. It also reveals a logistical dependency behind the boat's headline speed, because high-output petrol machinery required the right fuel as well as skilled maintenance. The exchange gives no quantities or performance comparisons, so it is a precise confirmation rather than a complete fuel study.